HomeMy WebLinkAbout0538.000H ,.-, -: ~ ~ .
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October 18 ... 19'90
HONORABLE CITY COUNCIL
Palo Alto ... california
Members of the Council:
This is an informational report ... no council action is required or
recommended •
Late last year., as part of the emergen<:y powers associated 'With the
October 177 1985 earthquake., the California Department of
Transportaticn {Caltrans} implemented lI'odifications to roadway
st.riping in order to increase th2 number of travel lanes and
capacity of Route 84, from the interchange with Route sao (Nimitz
Freeway) to Karsh Road. These changes are described in a
December 7... 1989 staff report (CMR: 512 ~9). a copy of which is
included as Attachment 1.
The changes implemented by Cal trans included the designation of an
HOV lane in the westbound direction on the approach to and through
tbe toll plaza .. as well as across tr..e OUmbarton bridge itself.
There .... as no ROV designation in the eastbound direction. At that
time, staff formally requested that Cal trans designate a new ROV
lane in the eastbound direction for the purpose of system
continllity. further encouraging carpools/vanpools and transit
usage. and enscring that a travel lane would be readily available
for HOV use in the future. as tl"affic volumes continue to increase.
Durinq the ensuing months and in response to several rounds of
correspondence, coupled 'With the intervention and support of
Assemblymen Byron Sher and Richard Katz. Caltrans conducted a
special HOV Lane Operational Analysis Study of the Dumbarton Bridge
and Approaches. A copy of the study is included as Attachment 2.
As a result of this most recent study. as well as agreement reached
with the Metropolitan Transportation co~ission (MTC) .. which must
approve all HOV lanes in this metropolitan area$ and the California
Highway Fatrol (CHP). 'Which is responsible for enforcement$
C>!R:53S:0
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Caltrans expects to: Ca) retain the HOV lane designation on the
westbound approach to and throuqh the toll plaza p 'b) remove the
HOV designation in t.h~ 'Westbound direction o.."'l the [)I .. mlharton Bridge
. itself, and ee) take no action to designate an HOV lane in the
eastbound direction.
These actions are based upon consideration of the operational
analysis for several alternatives as described in the report, as
'Well as the real and practical 1 imitations on effective enforcement
by the CHP.
Staff does not intend to pursue this matter further, l..::'".less so
directed by Council.
Respect€ully submitted~
MARVIN L. OVERWAY
Chief Transportation Official
,>,(f .. _ £ ,,«,.-.
JUNE FLEMING I Assistan~ City Man;iger
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KENNETH R. SCHREIBER
Director -of Planning and
community Environment
Attachments: 1. CKR:S72:9 (December 7, 1989)
2. D'..lmbarton Bridge and Approaches; HOV
Operational Analysi5~ July 1990
cc: Asserr.blyman Byro-n Sher
Assemblyman Richard Katz
City of East Palo Alto
City of Menlo Park
Town of Atherton
CMR:53B:O 10/18/90
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_«I)) Statfe1dt _____ O
_" _AT_TAC_HlIEN_! ------,
December 1. 1989
HONORABLf CITY COUNCIL
Pil0 ATto. (aliforsia
RC?.!!_! __ ~ ______ ~_~ ___ J..Dum~_artoD ______ ~r.l dge) -I n(rea S;~ inTra f f_1..<:: La:1eJ.
I'te~bers {If the Council:
Ibis h an i~fof1l1ation.a' staff report. No City Counc.il action is req:uired <II""
r€commenaeci.
Th~ Callfornia D€partme~t of Transportation (Ca1trans), under emergency powers
~ssociated ~lth the Cct~ber 17, 1989 earthquak2~ has undertaken capacity
m9dificalions tg Route 84 from the interchange with Ro~te 880 {~im;tz freeway}
to ~arsh ~oad+ The changes involve restriping and minor road wicenings. The
c.hangp.s include the following:
~,g~_! __ ~ 8~a to To1.1 _~~) ___ <l __ .z __ ~:
o Restrlping t~ <reate six lanes of traffic.
o Deslgnatiog "inside shoulder hnE:~ d:; HO'V lanes {3-penon c:upootsJ iD
lIIestbounrl direction only from Newark Boulevard; no HOV lane eastbound_
T_c) J ____ ~I~ __ ?_~~J;!_!l __ i_y __ ~_!:.~i _t .. L ~_.\l_~ __ ~ __ i:!~ :
o R~:;trip;-ng til c.reate six lar.es. of traffic. Traffic lanes 0'1 the
Oumbdrton Bridge 'lliil1 te 11 feet wide, with I-foot offset from CErltH
d~vlr5eL
o (onllnuation of westbound HQ'V lar.e to Illest end of Bridse to allow for
transition and merging it Vnj~ersity A~enue. ~a HO~ 1ane edstbound.
o .lit Uni .... er'iity Av€nl!e intersection, addition of a third tnrough lane
W'estb{1und.
!:!n j.Y~_~ __ ~J __ t!_ ft, 'V en u e .....! __ Q ____ ~_ c1_T_~_"_ ~_c} __ c1 __ ~ __ j} __ .i1.rr._() __ rl __ ~ ___ J_)( p re S __ ~I!II_:a..1.l
o Restriping to credte fou~ lanes of traffic.
a After University Avenue~ t~e third ~estbound through Tane is dropped.
~ut tne sTngle Teft turg lane at ~illo\ll is extend2d b~ 500 feet
(roughT) haTf~a1 back to UniversitJ).
U19,:~72:9
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Caltrans' road ~ark did not infringe upon tne designated bi~e~~y in the
Route 84 corridor_ Thls facility. a two-~ay off-road path t~at ~xtends from
the East Bay across the Bridge and alor,g t~e 8ayfront Expressway to Marsh
Road~ remains unchanged.
file <,~t~ .. tion of iii: one-way ( .... e:.tbound) I-jO~ lane +s contrary to the general
prictice of ~avlng ~o~ lanes serve both dlrectlor.s of tra~el. Given the great
dlfficulty ]Q (onvertlog an establisned traffic lane to HOV stat~s. staff sent
tne attacned letter to Burcq Bachtold, Cal trans District nirector~ urg 1n9
(altr2ns to establish an eastbound ;~V lane. Sub~eq~ent conversations ~;tn
(altrans ~taff indlcated that there is no recepti~~t~ to add1ng tke eastbound
HOV lan~ recommended by City staff.
Rp.s~ectf~'ly submitted.
k/; >"L7t1 tf' ~;;k'id;7
nNNETH R. s(HRE!BfR
O\rect~, of Flanntng and
(ommunit, fD~ironrn€nt
~uru.~~ 1~ -r-lEMING
Assistant (ity ~anager
Attachmel:lt
(:c: To_n of Atherton
(it~ of fist Pa10 A1to
(it1 of l1enl0 Park
CMR,57Z,9
DumbtI'lB(/ks
12/7/89
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(<lS) 329-256]
Jo!r ~ Burch Bilchtold
District Director
Cal trans -District 4
P.O. Box 7310
San Francisco i CA 94120
c
fity of }hlo }Hto
November 14, 1989
It has come to our dt~ention that Caltrans has recently restri~~d
Route 84 from Route sao to the ~est end of the Dumbarton Eridge
rrem four to six lanes under e:::Jergeocy pO'.orers granted for traffic
mdnagement purposes in t~e aftermath of the earthquake. We
un...ierstand the need for this action given the current unusual
situation in the Bay Ar~a. HC'oi'ever, Caltrans enginee~s haOle
jnfor~ed us that an ROV lane is to be included only in the
... estbound directio,n for this segment of the route.
We knc'J c,f no other instance 'Wt.ere an BOV lane has ree:-\. installe,j
in only cne direction on a state highway in the Bay A=ea. ~nile
the ne..r 1o.'estoound HQV lane should encourage ridesharing and use
c! tr-ansit in the D1.lv,bartcn Bridge co["rid.ar i vie feel it is \I~ry
im'pc:c-tant to establish a full dual directional EOV lane syste::a at
the outset to :maximize the effectiveness of the commuter lan.es.
Ccr.versely .. it ....-ould be extremely difficult to convert the thirj
eastbound lan~ to an ROV lane at a later time.
In conclusion, we ~ould urge you to designate ne~ HOV lanes i~
both directions on the restriI=,ed segment of P.oute 84.
very truly YOlJrs ..
1,W
WI I.LIArl! ZANER
City Manager
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oePJ..RTMENl Of T~5PORT"'TION
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"-ngu?l 13, W1E~~EJiJ2\ID
AUG 2 0 ~9SO
WAI'?'t\ott",. \,.If" r~'1'l" .. \l
-IIr OF PAlO ~t1l
lltr. Willi"'lIll Z"nner
city MFln<'lge-!
Cit~ of Palo Alto
I'O Bo!': 1025-0
Palo }I,I to .. C,," 9430.3
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o ATTACHMENT 2
(ft-,ICE Of rh' CITY MAf!AG£i
ALA-/SM-811 EO'il" ....
~~~bartQn Bri~ge
05??O .... 'RS-T4T3960
Att;:;cl,f'>d fc'r 1'0ur infol-rr,.:::tic,n is the r"':port m-entl'8ned jn O'Jr F!ar
li£>r t€'tt~r c,f '·lay 30 ... 1,}'90 in r"'!sp'::m~e to yc;.ur r€-~uest. It i"re
!".('nts d;;!!ta ga~,heI:€'d for Poute 84 in San Mateo an-::i Al:<!TT':eda Counties
-<,::.1" tl-:.e DUln!:'3rton Eridge and its appro9ch"'!!:'. It. al>'o p·resents th,,=,
Il-!stric:ts" ('-p~tati.:;nal ?nalysis of thf.s rlat.a for C'ari::--u5 hi"lh 0<'"
(-:-\If'a .. -w:::y ~~hicl€' (IV/'-,l) lan~ scenarios.
£'111 the ?ft<:'tn;o-n of ,June 2Sth ..... e lfI~t ",·it.h rer,[~soen+_~ti·.;:-=s of <::1",('
Nptt'"",Polit.an Tran.!'-~rtation Commissicm (MTC) and 1Jle C.;;!lifot·r,i?ll
rri'~rh ... r",y t'::)'!.,..-"I (C'-HF)i to di~cus.s. t.h~ data <lnd ar.<'ll.l!Cis _lI.';."l".;·::-rr-?"1t
..... <:l;:;. t'p;=t'.:il.r-d ,,;'1 H0'J 1 a no:-: I imi ts anci I""JCcllp.~n..;y, ... ihicl, is F'T ..... "..€lJtF-,]
;];:; ttl~ c{.n,:lu~ion aM l'o:'!comm~ndatj0n sectjt'E of 1.!."", to.r ...... rf:. Th€'
m01~ .s.ignifi~4nt jt~ms folIG~:
T1w ,",7..~t __ in2 ",,~~tl·'21.1'1j H0V lan-? 0€'tlo".2en tJ,e toll pla.:.~ and
Ne;..r"'lr-;": F'-":l<o:>vard is ~_h.,. ~.n11 segrr,e-nt "'ith cr~~::: {{',r ("'al] f:>=-ni;;;
Higil'''''''''of F'3:tr-c-l (CEP) €'nfC'I"cerr,ent.
The 'o.:'?'sth·-,und l"l.n"10 · .. ''''!~_t of th'" te,l! r-18za "n--~ tho:. ~a,;=, •. t'()~lr.'l
]",,~::: ha',''=' no ar":'~5 f(r !':r.forc~m-::-nt as :all ;;.~.'2iJGhl<;" t''t" ... ,Itl,·nt
..... i=lS utiliz""d t,::,> ot,tajn the rt':JrIiti(!TlC!! ro;::d· .. ·ay r;:1j·-,ac·~t~'. Ae..;t
ccn:;;,'=''111t:"n-.::-:-the CHP .....-"uJr] nr,t" suppr,rt th-= ret.:::nt-i"'-/n c,f 1.'.", rVfJ
lan~ ',,'~st r:,[ th~ toll plaza c'r t'-b~ con','er'si':.n ':If ":'r.<:' s,f I!,,,,
eastbou[1'..! la_ne-s to an fJ~)I.' lalL"'. MTC staff is (,nJy !"t1r'r<"r ~ i','o
of th~ r~t:""'f'.tjon of t,'h-o.: .1O:;:,~t1:>O\.1nd ali'J lan'O' ea:-t -:f tr.~ t.,.,11
F] az:: f-:''! t.bo:. sour.O:-r"O'ascyn.~.
By legj~l~tive ~cticn it is nec~~5~ry {or Caltrens to 0t\ain
the ;C'Wl'''''!a 1 of MTS ('?1.' all HOV lan~s j n the F-aj" }l_.r~a.
Th~ ·..,""'<::t!-·,'Jll00 B"'Y,,' I;!:1E! l'"~JrnE'nt past of the to' I plaza J:'ro'lid-e;o;
sj'Vlifi'-';},-lt tjXE. ~,aviJ::';.r'" an.-j otr.er iIlce>ntivez fer nov Corrr.~-
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Mr. William Zanrler
rag~ 2
August 13. 19'90
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tion. Thi s area is enforceable by th~ CHP. and hills the sup
port of HTC staff.
The existing ~3 plus~ occupancy requirem~nt is coneistent with
6ther loll bridges. Lo ... ·erjng the occupancy requirement to -2
or Ill0re-Wlould o,terload the road",Jay at the Willa,.. Road Inter
section. It ~ould also r~duce the time savings to ~h~ legiti
mate nov lane users ...... i thout any appreci able increase j n lane
use_
Creation of an eastbound BCY)" lane, reg .... rdless of occupancy re
<:;tuinoment .. 'Would require the con7JershJn of a mixed-flo .... lane,
and 1o/'c>uld increase travel time and create del ay for both ati xed
flo", a..rri HOV traffic_ It wO'Jld be difficult for the CHP to
enfor-ce ... trlereby increasing the potential :for violation an-1
non-~cc~pt~nce by the public.
Rence, it is recommended that the existing ~estbound HOV lane
..... ith a -3 plus· <x:cupancy be retain.,.d, b'..lt that the limits
should only e:Rtend from Ne .... ark Boulevard to just .... 'est of t_he
t.oll plaz.a. This recommendation is supported by District 4-...
the California High~ay Patrol and the M~tropolitan Transport~
t10n Commission staff, a~ I eTpect it vilI be acted on by th~
eOO <,r this month.
Th;m"k ycu for the c'Pr'ortunity to provide you the latest status of
t~ 'F:f(_.~V I ~nes and the op",r<'l:tion of thE DoJ.robarton Bridge aI'ld ap
proaches_ I nope this addresses Falo Alto's concerns and if you
desi re addi ti o.nal inforrr.ation or have further I?J€st iens .. please do
not h0sit~te to call me at (415) 923-4274.
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.. A .... J'PE5TCN· W. J:EL·LEY
(. Iii ~tr lct Di rector'
Attachment
cc: A5sembl~:man Richard Ka.tz
A~,seml'lyman Bryon Sh'?r
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Stale of eaflfomia
Departme~ 0/ Transportafron
Districl4
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5p«-id 5~<!4
IIIGH'i'AYOPERATlONS BRA,"CII
RECEIVED
AUG 1 6 199n
DMS/oN OF <!383 """""1 TRANSPORT A T ION --"V<>V<>
ROUTE
DUMBARTON BRIDGE AND APPROACHES
HOVL OPERATIONAL ANALYSIS
July 1990
Recommended lor Approval Dale
Bil R. Shoemakef-. Se nior Transportation Engineer
Report prepared by'"
lJ&;1JD,4~
Hanibal O. Sen-an, Associale Transpo::-:'rt::;afi"o-:-n"E-:-ng,jneer
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TABLE OF CONTENTS
INTAOOUCTON ........................ _ ............................................. _ ........ , ...... .
SUMMARY CHARTS:
Eastbound ......... _ ......... " ...... ,., .......... , ........ , ...... " ......... ,., ......... '......... 2
Weslboood, ....... _ ....... _ .................... _ .................. , .......... " .......... " ... _ 3
INTERSECTION ANALYSIS (Table It .......... ·.·.· ... , .... , ..... ···.· .. · ......... 4
BACKGROUND __ ._ .................... _ ...................... , ......... , ............ _ ......... ,.,. 5
TfWHC CONDITIONS (before !he earthquake) .....•............... , ......... _ 5
TflAFFIC CONDITIONS (afterlhe earthquake). ........•......... ,., .............• 6
AlTERNATE OPERATONAl STRATEGIES ..... , .. _ ..... " ............ , .......... 1
1
OTHER ISSUES ......... " ............. _ ................................. ,_. c .... ,·· •. · .... ,',., .. -9
CONCLUSIONS AND RECOMMENOATKlNS, ...... , ... ~ .. '....... .... . .... 1::'
ADDITIONAL MATERIAlS:
Lane Coofl!JUfaUOO Oiag<am 5:
Post Earthquake (exisOng)............... ............................ . .... 11-12
Post Earthquake (easlbound HOVL) .......................................... _ 13-14
Speed Profiles:
Pre Earthquake ........ , .................................. _.... . ................. _ I!;
Post Earthquake_ ......................... _.,. __ ...................... .. ....... 16
Vehicle Ocatpandes... .. , .. , ................. " .......... _ ..... _ ...... , ........ , .......... 17
lane Distributions (existing) .............. , ........ , ........................ ,., ......... _ 16
Lane Dislribu1ions (eastbound HOVl) ..................... __ ... _ ............... 19
Voolafion Rales (exiSOng) ... _ ......................... , .....•..... , ............. _ ...... __ 20
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INTRODUCTION
This report is 10< the Ihe IA>mbanon Bridge and ~s approaches (Roule 84) beIWeen Marsh Road and
Roule 880 in San Maleo and Alameda COUf1fies .• descnbes Ihe current traffIC operafions and the
traffIC conditions prio<lo!he lorna Prieta Earf1lqua1<e. AlSo. Ihls report discusses whalllle traffic
operafioo would be under differelll aIlernale strategies. The peak commule traffIC in !he mo<ning is
in !he weslbour>d direction, and the peak commute traffIC in Ihe evening is in the easlbound
direction. One additional lane in each direcfion on Route 84 was added Iol1owing!he earthquake by
res!rip1ng the highway and eITminaUng shoulders 10 accomodale the additional demand due 10 the
closure of !he Bay Bridge.
t
EAST PALO
ALTO
n;OANTON NEWARK
AVE
NEWAIIK
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LOCATION MAP
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SUMMARY CHART
ROUTE 84· EASTBOUND PM PEAK HOUR •
J
DJYBARTOO [ I~ I II I~ I~ BRIDGE '.77 '7 ~
2
~ >< '" 0 ~C .. J '" tt: ,\~ -..:.
0: =' 0: Ow W~ < w i"~ " 3: « 2m
2
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,lane I 2' lanes 2 lanes :2 lanes
-8onienecl( althe OMllaf1B • Near capaciry -Near cap.lC~ sadTon east of the wmo .... Rd:
• -DeTay of 1-10 rriniJ'les tJpstream -
~ afWmo..,Rd •
,
, .. -See Table 1 Tor l V at1d lOS ~
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2 Lanes I .3 lanes 3 lanes .3 Lane-s
·Frea lIow -Free flo .... ·fre9 ~ow •• ~. ~ See Table 1 for LV and LOS
me ,. r. ~:
,:£' ~p ;;~
oE .. -
1 .. 1 }«Jyt I 2. lllOVL 2. t HO\It. 3 lanes
• 8otHan9Cks ill Wille ... Ad. -AboLII 200 vet1ic1es ~ il!ersecfion (11 (fltmrtes or c1eTay). WDUJ(f qualify to use • Free 1'10 ....
~~ 3(1d I.k1wersity AlIa. Intersadforl the HOvt
(12 rrinU'!es of delay) ~!f -.A~o deTay of 19 mil'lUles Jor ar -Froe flo"", JOI all -. \/enicles 01'1 NIB Wino.. Ad. lanes
~~ 8 -About 100 'Yshicles would"
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quarlfl8d 10 vse the OOVl
-See T abWi 1 fur LV and LOS
t.1HOVl I 2.,HOVL 2+1HOVL 3 lanes
• BoDlenedls at Wirro .... Rd. . About 500 lIehic:1es
• fnlersecflOO (10 rn[nutes r:I defay). would c;:ualil) !o usa -frMo TIow
~ ilI1d Univtl~ilJ Aw. i1!ersocflOn the Hell\.. • ,-{12 mOllie:!. of defay) ~ ,,0 -Also wiay gf 19 m1nutes for a~ . Free flo .... fey at!
~~ vehicles on NfB Wino .. :Ad. !anEls
-N 0--Abo ... 140 vu'hic:lBs would 8 quaJir~ 10 use the HOVt..
-See Tahre 1 rot'" LV and lOS
2
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ROUTE .. , ,~ '04.HIGHWAYOPEAAnC)NS 8RANCH
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SUMMARY CHART
ROUTE 84 -WESTBOUNO AM PEAK HOUR
TaU
()(Jl.lBARTON I L ... , /,
BRIDGE Z "" I~ J [
PLAZA a . a: !z~ < -~a .,
'" w
;0
Z =>
1la08 I • Lan ..
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-See Tabre 1 br LV and LOS
2 lanes I 3lanes I •. ,
-See ex;sang condition 01 Table 1 foI"
LV and lOS
-O:;caskmaf mainline sTo ... down rue
10 rhe heavy re~ rurn at wnrow Rd.
intersec(oo
2i..al'l9s' 13 lal'l9.S 12 •
,
-Same as 3 .. HOVl. eJCcepI more
severe mainr.ne slow down due Ie
ihe fieavier1efl tum at Willow Ref.
"inlersecflQn. (2-+ I-CVl would
denver more 1ratrlC 10 111e W"tlIow
Acf. intersec!ion)
.. ~ lanes
-
-Traffic a1 capacity
2+1HOVl
-Free flow corufrtion 'bf aD vehk:les
-.About 560 ... enic1es using the I-IOVt
-VdaflOn rate is about 78%
-HOVl nor enforced lno area for
enforecer:1enl: on [he bridge}
2.H-iOVl.
-Free 10 ... conOrtion lOr an vehicles
is e.lCpected
-AbouI 570 vehicles would be
quafified 10 use the HO\n...
3
0:< w~ 0 Zm J:
~
S+1t 2 lanes
-Ekltffeneck allon plaza
-Mix ed no .... deTay about 10
min LItes
-HOVs save about 2-3
mTnu1es
-About 150 ... e'hic'fes used
lheHCM.
-YICia1icn rale was
about 9%
-HO\n... enforced by CHP
+1] 2+'" HOVL l2lanes
-80tnened allO~ pfaza
-Mixed now c:JeTay about 10
minutes
-OOVs sa\le about 10
minutes
-About 2150 'oIehicfes using
the HO"-
-VIOlation rale is abouf
20%
-HOVL enforced tly crt?
13.'1 2' + 1 HOVL 12 lanes
-Scttlened. at Ton plaza
-Mi;.: ed 00 ... oelay about B
mlnLl1es is expec1ed
-OOVs would save about
6 minutes
-About 570 vehcles ..,ould
be q.ua~ir.ed to use me HO'v1...
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ROUTt 84. o
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ILV
LOS
Route 84 (Bayfront Expressway)
Intersection Analysis
Pre Earthq u ake
1150 1190 1440 1550 1450 1200 1700 1500 1240 1800
C C E FED F F 0 ~
Post Earthquake (exisUng ,",n"ion)
Post Earlhquak e (assumed .,SIboond 2. HOVl)
J l V 1150 1210 800 1400 900 1020 1540 1970 1320 1950
LOS c c A E AlB B F F D F
Post Earthquake (assume easfoound 3. HOvt)
Il V 1150 1210 850 1500 900 1150 1650 1900 1520 1960
lOS c c A Elf AlB C F f f
.. Assumed capac7ty or 1 BOO vert for Univers4ty Aile. rnersection In (he evening and 1500
ve1L '/or lt1e Ofhef intersections
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BACKGROUND
Route 84, within the project ~mijs, was constructed in 1984 and serves as a direct fink
ootween the DJmb€1Ton Srldge and Rou1e 101 via Marsh Road, Willow Road (Rle.
114), arid University Aveooe (Rle. 109).. Also Rou1e 84 ;s a fink between the
DJmbarlon Bridge and Route 880. Route 84 was OfigTnany conslnx:!ed as a two-lane
expressway from University Avenue 10 the DJmbar10n Bridge. In 1988, a projee! was
completed from Willow Road 10 easl of University Avenue. WeSlbound Rou!e 84 was
restripOO with an additional !eft turn lane aI the University Avenue intersection and
with an 2OditiooaT through lane Irom University Aveooe 10 Winow Road. Cn
eastbound Rou!e 84, an additional lane throug/1 the Universny Aveooe inlersection
was also added. The purpose of the restriping was 10 reduce the recurrent Itaffie
congestion by increasing the capacay to accommodate Ihe demand. &!e lane
config'xafion diagrams_
After the October 17, 1990-earthquake, an emergency congesfion reflef project was
completed 00 Route 84 from Marsh Road 10 Rou!e 880 in Newark. This faC1Trty was
reslrlped to 4 fanes from Marsl1 Road to University Avenue, and 6 lanes Irom
University Averue 10 Route 880. The DJmbarton Bridge ~se~ was restriped from four
12-foo! lanes 10 6 lanes with 11-foo! widths and two 1-foo! shouloors. The restriped
new westbound lanes are CUfTen~y reserved lor HOVs and are ooing urtiilzed lor
vehicles with a minimum occupancy of three Of more from 5-10 AM and from 3-6 PM
The new eastbound lanes are cu"';n~y mlxed !!ow.
Prior 10 the October 17, 1989 earthquake, the fimft of the westbound HOYL was Irom
aboul 890 fee! easl of the ton plaza to about 2SO feet .... esl of the Ion plaza
(R3.351R3.13J. Arter the earthquake, the OOginnTng of the HOVl was exlenPed
upstream 10 about \he Newarl< Boulevard interchange, Also, the end of the HOVl was
e><landed downstream 10 withT n 112 mne 0( the University Avenue inlefsecfion_
TRAfFIC CONOITlONS (prior to the Oct 17, 1989 earthquake)
Westbound -AM
The peak commute traffic of Route 84 in the mOfning has been in the westbound
direcfion. The main westbound bottleneck of !his roule has been lha laD plaza Peak
hour \rafflc congesfion from this bottleneck usuany e><lended 10 the Newark Boulevard
inlerehange and had a delay of a!lou! 10 millules, The duralioo of this conges~on
was \rom 610 9 AM Peak hour Iraffic volume lor the HOYL was about 150 vehicles,
and HOV users saved alJou( 2-3 minutes in the peak hoof. TraffIC on Rou1e 84 west or
!he lo~ plaza was operating al capacity during the peak hoof_ The HOYL was
enforced b~ !he CHP and had a 9.3% violafioo rate. See Table 1 lor LV and lOS.
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Westbound -PM
No recLKrent ~stion occured in the westbound direction during the evening peak
/lour. The evening HOVl. pea~ hour volume was aboot 50 vehicles, and the peak
hour HOVl. time savings in the southbound direCtion was minimal. See Table 1 10<
LV and lOS.
Eastbound -AM
Roote 84 was operating withO'Jt delay during the moming peak hour in the eastbound
direction. See Table 110< LV and lOS.
Eastbound -PM
The peak commute traffic of Route 84 in the evening is in the eastlx>"nd direction.
The main eastbound botllenec~ was the single-lane section of Roote 84 belween Ihe
Wino,", Road inlersection and the University Avenue intersection. Mainfine peak
period congestion from !his location generany extended upstream 10 about the Chi1co
Road intersection and had peak hour delay of 7-' 0 minutes. East of Ihis section 10 the
UnivefSlly Avenue intersection. Roote 84 operated at !he capacity du,ring Ihe evening
peak houf'. from the Univers~y Avenue intersection 10 Roote sao, Route 84 generally
was operating near capacity during Ihe evening peak pariod. Peak period congestion
I1OO!T1ally lasted from 310 6 PM. See Tabte f !of LV and lOS.
TRAFfIC CONDITIONS {aHer the Oct. 17. 1989 earthquake)
Westbound -AM
The peak commute traffIC of Route 84 in the morning is in the westbound direction.
The maill Ix>tlteneck in the .,.,estocund direction of Route 84 is the Ion plaza,
Congestion from this bottleneck usuany extends ""stream to about the Newark
Soutevard interchange during Ihe peak hour. As a result, vehicles in the mixed flow
lanes experience about a 10 minute detay in Ihe morning peak hour.
The existing HOYL in the westbound direction begins at Newar!< Boulevard
inlerchange. Vehicles ectering the }lOVl at the beginning of the lane 10 111e Ion plaza
save about 10 minutes during the morning peak hour. There is no other delay in the
mixed now lanes west oIlhe Ion plaza; therefore, the HO\o1. time saving west of the loR
plaza is minimal. Occaslonan~ westbound demand exceeds the capacity of the single
left turn lane at the Willow Road lnlers6ction causing some mainfine congestion
between Winow Road and University AvenL'€ during the peak hou<.
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The peak hour HOVL vofume is about 250 veNcles east 0I1he toll plaza. Til<! violation
rale 10< this se<:~on 0I1he HOVL is about 20% during Ihe morning peak hour. The
volume in the HOVl west 0I1he Ion plaza is about 560 vehicles, and Ihe peak hour
violation rate is about 78%" The ~on 01 HOVL wesl 01 the Ion plaza is no! enforced
rigorously because there Sfe no enforcement areas on the btidge since the ,eslriping"
Also. enforcemenl is diffiC\J~ due to the fad [hal the 001)' lum-around points are
Umversily Aver\Ue and Thornton Avenue. The portion of the HOVl east 01 the Ion
plaza on the otll<!r halld, is enforced by the Carrfornla Highway Patrol (CHPl" See
Table 1 for It. V and LOS"
Westbound· PM
Currently flO congestion is occuring in Ihis direcflon during the evening peak hour.
therefore, flO Ume savings for the HOVL is experienced. HOVl volume in \he evening
peak houris atkM SO vehicles east 01 tM 101 plaza and 150 vehicles west of the kln
plaza" The viofaVon rate is about 5% east 01 the Ion plaza and about 80% wesl of 111 e
Ion plaza The poruon oIl11e HOVL east of the ~n plaza is enfonced by the CHf'_ See
Table 1 for Il'( and lOS.
Eastboo nd -ANI
Roote 84 in \he eastbound direction during the morning peak hour is operafing free 01
congestion. See Table 1 for IlV and lOS"
Eastbound -PM
Til<! peak commute traffic on Roote 84 in the evening is in the eastbound direction.
Currently flO recurrent cooges~on is 0CCIJIing in lIle eastbound di re~on. See Table 1
10< LV and LOS"
ALTERNATE OPERATIONAL STRATEGIES
Several atternate strategies for cperaling Rout. 84 are discussed below. The
Ionowing strategies describe the expected operation of Route 84 under each
scenario. These strategies are for comparison purposes only, whether they are
peWea Dy feasible is unl<now n.
WESTBOUND
2+ HOYl-If the occupancy requirement of the HOVl in the westbound direcflon was
reduced f,om thlee-or-more 10 tWG-Or-more, abool 370 more vehicles would be
quaflfied 10 use the HOVL legany dorlng the morning peak hour. Vehicles'n the
HOVl would save about 8 minules of Iraveitime !rom the beginning 01 \he HOVL to
the Io~ plaza as opposed 10 existing Iraveltime savings ell 0 minutes. Time savings
lor HOV's west ollne Ion plaza would be minima!.
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Because the HOYL would derrver more traffic downstream of the bridge, traffic
congestion al1he University Avenue and Willow Road inlersections is e'peeled 10 be
worse than the exisOng condition. DlJe 10 this increase, She single Teft lum lane al
Winow Road would no! l1andTe the deman<l without some delay for an vehicles
destined for Willow Road. This del.ay would reduce the benertis for HOYt users.
RedUcing 1he OCCUj>ancy requirement 10 two-or'more may cause confusion 10 the
molorists because the minimum occupancy of the HOYL lor an the other Bay crossing
faciITties are thtee-or-more persons. The Iocrease 01 er>gibTes on the other hand,
could improve the P<JbIic percep:ion thai the HOYL is adequately utirrzed. However,
any changes 10 the occupancy requirement woold need coocurrence of the California
Transportation Commission as the lxidge is a Ion faciu'y and there would be financial
coosiderations .nvorved. The concurrence of the Metre>po"lan Tracsportall)n
Commision (MTC) woold also be required lor Ion relaled changes.
Eimjnafiog the aMed HOIJ!.
aJ If the HOYL west of the-Ion plaza were re!tlrned 10 a shoulder, traffic conditions
would be similar 10 conditions prior to the earthquake. See Page 5 lor pre-earttKjuake
conditions.
b) If the HOYL w~ of the ton plaza were converted inr" a mi.ed now lane, the
controning bottleneck would be the ton plaza A!. the ton piaza traffic oolput woold 00
similar 10 pre-earthquake conditions. However, the level of service at a~ other
intersecfions would be similar 10 post· earthquake conditions. See Table 1 for post
earthquake conditions.
EASTBOUND
3, HO\i'l-if Ihe eastbound HOYL is provided on the bridge, about 200 vehicles with a
three-or-more passengers would be qu<>lified to use 111e HOYL in the evening peak
hoof.
If the eastbound HOYL were eXlended 10 Marsh road, about 100 vehicles woold be
qualified 10 use the HOYL. Mixed now COf,gestion woold occur on the Baylront
Expressway approaching 1he Universily Avenue and Willow Road 'ntersections. Also,
an vehicles 011 WinOIlf Road headed 10 Route 84 woold be constrained. About 11
minutes of delay is expecled lor the vehicles using the mixed flow lane 00 1/1e Baylroot
Expressway west of the \Vinow Road il1!ersec!ion. Nro an vehicles including HOYs"
1he norlhbound rnrection of Willow Road would expenence delays of about 19 minutes
dufing lhe evening peak hour. fn add<tion. mixed now vehicles wl)uld be delayed
aboo( 12 more mfnutes due 10 a bottleneck al 111e University Avenue interseclion.
Because of these constraints, an traHic downstream of the University Avenue
intersection would be Iree of congestion with no benefit !}ained for the HOVs. See
Table I lor II V and lOS. This HOY lane probably wouid heve no areas suitable for
enforcement by the CHP_ Because of this, violation rales would prooably be high.
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2. HOV\. -W the easfboond HOVL were 10 have a minimum occupancy of two-<x-more
on the bfidge, aboL'! 500 vehicles would be efigible 10 use the HOVl.. east of
University Avenue, and about 140 vehicles would be quafified 10 use !he HOVl west
of the Univers~y Avenue in!ersecVon during Ihe evening peal< hoof, If an HOVl w~ a
minimum ~ncy of two-or-more were provided and .><lended back 10 Marsh
Road, bottlenecks would occur al the same IocaOOns as deSCfibed under 3+ HOVL
If IJis HOVl were extended 10 Mars11 Road, the eastbound mixed flow ve~,icles us;ng
1M Bayfront Expressway would experience a delay 01 about 10 minutes upstream of
!he Willow Road interchange. An vehicles, including HOVs, using oorthbound Willow
Road would e'perience a clelay of about 19 minutes in the evening peak fK>u<.
Additionany, mixed !low ve'tic1es approaching t/1e University Avenue intersection
would experience a clelay 01 about 12 minL'!es due 10 this bottleneck. M lane; in
eas!bound dir8CVon east 01 the University Avenue intersection would operate free of
congesVolL See Table 1 to< fLV and lOS. This HOV lane would Nve no areas
suQabTe to< enfo<cement by Ihe CHP_ 8ecause oIlhis, violaVon rales would be higl1-
if lIle added eastbound lanes were converted 10 HOV lanes, the HOVl should be
extended upstream 0I1he b<idge 10 about Marsh ."load, 10 bypass the congesVon and
10 pmvide lhe HOVs with a lime savings benifit ~ncenUve). This acUon. on the other
hand, would reduce the capacity 01 the U"iversity Avenue and Wi~ow Road
inlersectioos sig-nificantJy_ As a result. en vehicles iock.<!ing HOYs would experience
significant clelay. The HOVs would suffer more clelay approaching t11e HOVl than
aclual time savlngs ooce in the HOVl... Consequently, this could undermine the
effecUveooss of the HOVl and have a nagaVve impact on puNIC views when Mure
HOV projects are considered in this area.
Erominalino \/1e added 3rd lane -If the added eastbound lane were enminaled, IrafflC
cor.ditions would be simnaf 10 condifions prio< 10 the Oct. 17, IS8S earthquake_ See
page 6.
OTHER ISSUES
Enforcemenl areas: The existing westbound HOY laoo between !he Ion plaza and
Newark Soulevard is the only Eegmenl w1th areas lor Canlornia Highway Patrol [CHP)
enforcement
The ",es!bound Tanes west of the Ion plaza and The eas!bound JaMS have no areas lor
enforcemer~ as an available pavement was utifized 10 obtai" the additional roadway
capaoly. As a conseqJ8nce, the CH? does nO( suppO<1lhe retention oIlhe HOY taM
west oIllle Ion plaza or Ihe conversion 01 one oIllle eastbound Tanes 10 an HOV lane.
The Metropontan TransportaVon Commision (MTC) staff is only se>pp<>rtive of the
re(enfton oIlhe wes!bound HOY lane east o!!he Ion plaza lor the same reasons.
MTC approval: By legislative acUon it is necessary to< CaUrans 10 oo(ain the approval
01 MTC to< an HOY IarJes in the Bay Area
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Conversion 0( existing lane: In order to create an eastbound HOY lane l would be
necessary 10 convert an exisflng mixed flow lane. Even 1h0UQll the third lane was only
recently opened, it could be argued that Jt would be c.N1trary 10 our n",mal practice or
laking a mixed flew lane away fo< use as an HOVL Conversion wculd artiflciany add
conge slion.
Othec projects: Both Ihe San Mateo Counly Tax Measure and the Totl Funded Tax
Measure ~st a projecllo lJ\l9fade the west approach 10 the Dumbarton Bridge (RoUle
84) "" the 1995 year. At present there are no pmjects ~sted "" the area between the
bridge and 10" plaza
CONCLUSIONS AND RECOMMENDATIONS
The westbound HOY lane S€llment east of the Ion plaza provides significant Ome
savings and ofiher inceribves "" HOY formation. This area is enforceable by Ihe CHP,
and has the support 01 the MTC staff. -
The exisling '3 plus' occupancy requirement is consisterll with other laC bridges.
loweMg the ocCLIpan<:y requirement to '2 or more' would overload the roadway at
lI1e Winow Road intersection. It would also reduce the tTme savings 10 the legitimate
HOV lane users without any appreciable increase in lane use.
Creation of an eastbound HOY lane, regardless 01 occupancy requirement, would
require the conversion of a mixed flow lane, and would increase traveJ time and creafe
delay"" both mExed flew and HOY traffIC. • would also be dilficu~ "" the CI-IP 10
er.force, thereby increasing tna pon!ent;al for violation and noo·acceplaoce by the
public.
Therefore, Jt is recommended that the e,isting westbound HOV lane with a '3 pIUs'
occupancy be retained, bu! thaI Ihe ~m~s should only extend !rom Newark Boulevard
to just west of the ton plaza. This recommendatioo is supported by Distrct 4, the
Canfomia Highway Palrol and the Metroponlan TransportaflOn Commision stafl.
10
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San Mateo Route 84
Marsh Rd. to Dumbarton Bridge
Post Earthquake (existing condition)
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L. AOOE~APANi"Vl
Willow Rd. University Ave, LANE CON~IGUAATION
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San Mateo Route 84
Dumbarton Bridge to Route 880
Post Earthquake (existing condition)
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LANE QONP'IOURAT!ON
DIAGRAM
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San Mateo Route 84
Marsh Rd. to Dumbarton Bridge
Post Earthquake (wl!h eastbound HOVL
in addition to existing westbound HOVL)
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-------------
~, I Univor"iry Avo, LANE:! CONI"IOUP;ATION1 ), DIAGRAM _
~BOuNo}iOViJ
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San Mateo Route 84
Dumbarton Bridge to Route 880
Post Earthquake ( with eastbound HOVL
in addition to existing westbound HQVL)
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DumblU'ton Bridge •
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ToUP'",. ~ ~ ~ 7" ~
Thornton Avenue Newark Boulevard
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LANE OONFIGU"ATION
DIAGRAM
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ROUTE 84
Westbound "-M.
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SPEED PROFILE
Posl Earthquake
(1
~ {M·~Y 9PEAATlONS BRANCH
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begic Plaza end Juie ?d.
Wes1bound P.M.
Eastbouoo .... M.
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Willow Uorversity Brkl'g& Bridge Thornlon Ate.8S0
Rd.. kla. begin er.ds AYe.
Eastbound P.M.
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Wiflow
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University
AYe
HOV lane
8rkl'ge
begin
Mixed Flow lanes
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ends
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ROUTE 84
Westbound .... M.
Wesfoound P_M.
Eastbound .... M.
Eastbound P_M.
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WilloIW Unrvorsrty
Rd. Ave...
HOV la.ne
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SPEED PROFILE
Pre-Ea rthqu aJ<e
8rk:Jge
begin
Bridge
begin
Brdg.
.nds
--·---1
B<idgl
ends
MIxed Flo .. lanes
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004·HIGHWAY ~~R.It~NS S~.NCH
Ur"rvtl~~ wmo'fI'
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Thornton
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Fla.880
-+
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ROUTE 84 VEHICLE OCCUPANCIES (ALL 3 LANES)
Post Earthquake
• A.M. PEAK HOUR (7:00-8:00 AM)
~ 20cc 30CC I WestbOund I
Percert 85.7% 9.0% 3.2%
Vehlc1es 3526 369 -130
I Eastbound
Percenl 86.4% 8.4% 1.9%
Vehic1es 1046 102 23
• P.M. PEAK HOUR (5:00-6:00 PM)
IWestbound
BuSes Vans
{) 0
2 -0
0.1% 0
1 Q
Perrenl
Vehjcles
80.1% 14.1% 4.4% 0.1% 0.1%
1018 179 56 1 1
I Eastbound I
Percenl 85.3% It.O% 1.5% 0.2% 0.1%
Vehicles 3430 443 lil § 5
Cycles Trucl<s Tole! J
0.5% 1.6% 100%
22 66 4115
0.1% 3.1% 100%
1 37 1211
0.3% 0.9% 100%
4 12 1271
0.4% 1.5% 100%
16 62 4023
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PEAK HOUR
ROUTE 84 LANE DISTRIBUTIONS
Post Earthquake (Existing condition)
A.M. Peak Hour (7-8 AM). Westboond
West 01 the Ton Plaza
Vehicles
2360
~ ~ 1200 990
560 ~ ~ ~ m ~ ~
Median tiC1Vt Mixed M"IXed Median HOVt
Flow Flo ..
P.M. Peak Hoof (5 • 6 PM). Eastbound
West 01 Dumbarton Bridge
Vehicles
1600
,,9<)
1210 ~ 121a
~ ~ ~ ~
~ ~ ~ ~ S$
Median MIXed M"IXed MIXed Median MlXed
Flo .. Flo .. Flow Flew
18
---------, --~.-
People
2550
~ ~ 1290 ~ ~ ~ ~
V,LXed M"IXed
FblM Flo ..
People
197Q
~ "14S0
~ ~ ~ ~ ~
"'I"ed M"IXed
Flow Flow
.'
ruJuTE ...
ROUTE 84
. ,
. ,
/
0····
PEAK HOUR
LANE DISTRIBUTIONS
Post Earthquake
1(2 .. HCM-) i
\
AM. Peal< Hout (7-8 AM), W.stbOOnd
west 0I1he To! Plaza
P.M. Peak Hout (5 • 6 PM), EastboLtnd
West 0I111e To! Plaza
Vehicles
2340
~ ~ 930 ,,90 800
~ ~ ~ ~ ~ ~
Vecfcan HOVL MiXed t.rlXed
Fbw Flo .. Median HOY\.
I (3-. HOVl} i
P.M. Peak Hour (5·6 PM), Eastbound
West 0( \he T aa Plaza
Vehicles
360
19
Vehicles
,72<)
,600 ~ ~ ~ ~ ~ ~
t.r",ed loflXed
flooN Flo ..
•
•
ROUTE 84
(1'\ v
/
HOVlANE
VIOLATION RATES
Posl Earthquake
1 !wes(boUnd -AM •
.-",-",,' ....
H9% 20.1%
East or Dumbarton Tol Plaza
CEnforced)
I wes!bOU<ld -PM l
.i ,-.'
-""-.
c
.Q
iii
.Q
> -;.
East cl Du mbal10n Ton Plaza
(Er.fQrc€d'J
• PeaHIoor (7-8 MI. 5-6 PM)
Peak Period (-s-.-10 AM. 3-6 F1I,.')
e2Jl%
78,0"4
west of ()Jmbaf1on Toll PI;ua
~Enr{j~
60,0% 800%
West of Oumear1on Ton Plaza
(Nat" Ertfon::;ed)