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project overview

the Ocean Beach Transportation Study is further developing the circulation and access recommendations from the Ocean Beach Master Plan

it creates more detailed design ideas for roadways, intersections, pedestrian and bicycle access, parking, and open space access

it is conducting analysis and modeling of proposed designs to help decisionmakers and the community understand their potential performance

frequent closure of Great Highway - due to erosion, sand

traffic cutting through neighborhoods

limited connection from Sunset neighborhoods to beach

fast-moving traffic using Great Highway to bypass San Francisco

roadway designs encourage speeding on Sloat, Skyline, and Great Highway South

hostile roadway and intersection designs (Sloat, Great Highway/Skyline, Sloat/Skyline)

excess and poorly-managed capacity

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about this project

+ SPUR

+ NELSON\NYGAARD

+ AECOM TRANSPORTATION

+ San Francisco Municipal Transportation Agency

+ San Francisco Planning Department

+ Golden Gate National Recreational Area

+ San Francisco Department of Public Works

+ San Francisco Zoo

+ CA State Coastal Commission

+ National Park Service

project team project partners project funders

1 frequent closure of Grt Hwy

3 limited connection from Sunset

4 fast moving traffic on Grt Hwy

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speeding

speeding

5 speeding

6 unsafe roadway design

6 hostile roadway design

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hostile intersection design

hostile intersection design

unsafe intersection design

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excess / poorly managed capacity

excess / poorly managed capacity

2 traffic cutting through

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SFDPW will narrow the Great Highway from 4 lanes to 2 south of Sloat Blvd, due to chronic erosion

�� current southbound lanes will be vacated approximately 2016

�� 3 options for current northbound lanes:

- 1 lane each way - 2 lanes northbound - 2 lanes southbound

�� may require some improvements to nearby intersections to mitigate congestion

�� opens current southbound lanes for public improvements (see open space project):

- reconfiguration of parking away from bluff erosion - public access improvements, like a trail

flashing beacons to warn of Great Highway closure in four locations (SFMTA, office of Supervisor Tang)

further planning and environmental review of long-term vision

what’s happening in the short term?

existing condition: 2 lanes in each direction

option 1:1 lane each direction

driving lane

temporary pedestrian trail

option 2:2 lanes northbound

option 3: 2 lanes southbound

grt hwy at treatment plant facing south grt hwy at treatment plant facing north

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flashing becons

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key findings: transportation analysis

traffic implications

parking comparison

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traffic analysis and modeling

Transportation engineers developed these proposals using today’s best practices for roadway design, assessing operations with traffic software tools (SYNCHRO and SIDRA) for quanitfying level of service (LOS), average delay and queue lengths.

Proposals are currently being analyzed using San Francisco’s citywide traffic model (SF-CHAMP) to study their interaction with transportation and land use through Year 2040.

At future stages, these proposals will be subject to environmental review under CEQA, which will include further analysis, comparison with alternatives, and additional community input.

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17,50053,000

17,50050,000

18,00053,000

7,50025,000

31,700

53,0008,00040,000

12,50050,000

15,70053,000

existing capacity

17,50045,000

32,00053,000

30,00045,000

27,00040,000

23,00035,000

21,00022,000

18,00022,000

17,50024,000

proposed capacity

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intersection analysis

Although Ocean Beach is well-served by transit and bicycle facilities, parking is an important asset for zoo, beach, and local business patrons. The recommendations presented here, if fully implemented, would provide a slight increase in the number of available parking spaces.

area existing parking proposed parking

Sutro Baths Upper 134 134Sutro Baths Lower 56 56Great Hwy street parking by Cliff House 125 125Ocean Beach Lot - Balboa St. 166 166Ocean Beach Lot - GG Park 441 441Ocean Beach Lot - Sloat Blvd. 55 0Zoo Parking lot 459 459Sloat Blvd. (Great Hwy to Skyline) 396 165Zoo Overflow Lot 200 195Great Hwy/Skyline Lot 0 99Great Highway Sloat to Lincoln 0 252Zoo/Armory/Herbst 203 256total 2235 2348

Most streets near Ocean Beach have significant excess capacity.

Rule-of-thumb: a single travel lane can carry ~10,000 daily vehicles.

�� Great Highway capacity with 4 lanes is ~40,000 daily cars

�� Actual volume is only ~18,000 cars per day on Great Highway

Traffic operations assessment is based on “peak hour”

�����´3HDN�KRXUµ�YROXPHV�DUH�URXJKO\�����RI�GDLO\�YROXPHV��RU����� �� � ~1,000 peak hour vehicles per travel lane.

Great Highway capacity with 2 lanes: ~20,000+ daily cars

Sloat Blvd capacity with 2 lanes plus center-turn lane: ~22,000 daily cars

Example: Valencia Street carries ~20,000 cars/day and ~5,000 bicycles/day, with just 2 motor vehicle lanes (reduced from 4).

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Case Study : Valencia St

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+ coastal erosion will increase, threatening the Great Highway south of Sloat

+ as recommended in the Ocean Beach Master Plan, North-South traffic can be rerouted via Sloat and Skyline

+ existing roads have excess capacity, and could be designed much more efficiently

+ a coordinated set of improvements could improve safety, move sufficient traffic, and create a welcoming environment for all users

+ changes would occur gradually, over a 10-20 year time period

+ allows the creation of a spectacular roadless coastal trail connecting major open spaces, including Ocean Beach Fort Funston, Lake Merced, the SF Zoo, and Golden Gate Park

benefits:

+ greatly improved safety and comfort for pedestrians, cyclists transit users+ efficient, modern roadway designs to move traffic and minimize congestion+ designs moderate speeds, improve safety+ increased landscaping and green space+ increased environmental/stormwater performance+ improved connection from Sunset to Ocean Beach+ overall parking supply unchanged

a long-term vision

proposed elements

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sloat gateway. allows access to Ocean Beach and coastal trail. Includes amenities like restrooms, rinse stations, bike parking, and seating

roadless coastal trail. links existing open spaces with facilities for pedestrians and cyclists. frequent beach access. restored landscape and vegetation, asphalt removed. occasional slow-moving service vehicles for pump station access.

new connection to fort funston trails

safe connection lake merced trails. this intersection is uncontrolled today, presenting an unsafe condition for recreational cyclists and pedestrians.

coastal access parking (355 stalls) [S GH]

great highway narrowed. from fast-moving expressway to leisurely coastal access road, allowing continuous oceanfront promenade, safer, more frequent access from the neighborhood, additional beach access parking [x stalls].

sloat boulevard multi-use “path to the sea” recreational path along the Zoo edge allow access to the Zoo and Ocean Beach without crossing any roads.

sloat boulevard reconfiguration: the road is narrowed and parking is moved from the medians to the curbs to better serve local business and the Zoo.

zoo parking entrance improvements. driveway realigned to intersection at 47th/Sloat. allows westbound left turns into the Zoo from Sloat.

sloat/skyline roundabouts. provides efficient traffic movement, safe crossings, increased landscaping and quieter frontage for adjacent homes.

additional skyline roundabouts. roundabouts work well in series to move traffic with no stops while moderating speeds and providing safe crossings, including to Lake Merced trails.

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1 sloat gateway3 new connection to ft funston

4friendly connection to lake merced

5 coastal access parking

6 great highway narrowed7sloat blvd multi-use path

8 sloat blvd reconfiguration

9zoo parking entrance improvements

10 sloat/skyline roundabout

11 additional skyline roundabouts

2roadless coastal trail

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recreational access ( pedestrian / bike / jog )

parking + vehicular circulation

transit

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sloat boulevard reconfiguration

proposal: the road is narrowed and parking is moved

from the medians to the curbs to better serve local

business and the Zoo. A multi-use path for cyclists and

joggers serves the Zoo and beach without crossing

streets.

pros:

��3DUNLQJ�UHPRYHG�IURP�WKH�PHGLDQ�LPSURYHV�WUDIILF�IORZ�DQG�safety

��([WUHPHO\�ZLGH��RYHU�FDSDFLW\�URDGZD\�LV�UDWLRQDOL]HG

��1HZ�JUHHQ�VSDFH�DQG�ODQGVFDSH

��,PSURYHG�SHGHVWULDQ�VDIHW\�DQG�FRPIRUW��ZHOFRPHV�VWUHHW�life and supports local businesses

��,PSURYHG�HQYLURQPHQWDO�VWRUPZDWHU�SHUIRUPDQFH

��6DIH��GHGLFDWHG�PXWOL�XVH�SDWK�UHGXFHV�URDGZD\�FRQIOLFWV��allows direct access to Zoo, Ocean Beach, trails

��%HWWHU�DFFHVV�WR�IURP�WUDQVLW��LQFOXGLQJ�/�7DUDYDO����������

��2Q�VWUHHW�DQG�=RR�RYHUIORZ�SDUNLQJ�PDLQWDLQHG

cons:

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precedent: ��9DOHQFLD�6WUHHW

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47TH ST

SLOAT

view 1: entry to SF zoo at sloat blvd

sloat blvd plan enlargement

section D

section C

SLO

AT B

LVD

WAW

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A

46TH ST

45TH ST

47TH ST

LOWER GRT WHY

SF ZOO

section B

section A

sloat blvd section D (between 45th & 44th)

sloat blvd section C (between 47th & 46th)

sloat blvd section B (between Lower Grt Hwy & 47th)

sloat blvd section A (between Lower Grt Hwy & 47th)

sloat blvd reconfiguration

SLO

AT B

LVD

WAW

ON

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46TH ST

47TH ST

45TH ST

44TH ST

43TH ST

enlargement

42TH ST

41TH ST

40TH ST

39TH ST

SKYLINE

LOWER GRT HWY

GRT WHY

SF ZOO

WAW

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view 1

sloat / skyline roundabout

proposal: a well-designed modern roundabout

provides efficient traffic movement, safe crossings,

increased landscaping and quieter frontage for

adjacent homes.

pros:

��&ODULILHV�DQG�UDWLRQDOL]HV�H[LVWLQJ�H[WUHPHO\�ODUJH��complex intersection

��8QVLJQDOL]HG��´\LHOG�RQ�HQWU\µ�GHVLJQ�PRYHV�WUDIILF�steadily and efficiently

��(IIHFWLYH�WUDQVLWLRQ�IURP�IDVW��VHPL�UXUDO�6N\OLQH�LQWR�shared city streets

��+RPHV�IURQWLQJ�RQ�KXJH�LQWHUVHFWLRQ�WRGD\�ZRXOG�instead front on quiet, landscaped lane

��0HGLDQ�ELNHZD\�(DVW�RI�6N\OLQH�D�VDIHU�DOWHUQDWLYH�across Sunset Blvd

��7UDQVLWLRQ�LQWR�PXOWL�XVH�SDWK�DORQJ�=RR�HGJH

��/DQGVFDSHG�´*DWHZD\µ�LQWR�UHFRQILJXUHG�6ORDW�Boulevard: opportunity for trees, vegetation, public art

��$GGLWLRQDO�JUHHQ�VSDFH��LPSURYHG�HQYLURQPHQWDO�performance

cons:

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SLOAT

SLOAT/SKYLINE ROUNDABOUT

view 1: entry to SF zoo at sloat blvd

proposed roundabout at sloat & skyline

existing intersection at sloat & skyline

SKYLINE SLOAT

SLO

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view 1: entry to SF zoo at sloat blvd

sloat blvd reconfiguration

SLO

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LVD

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47TH ST

45TH ST

44TH ST

43TH ST

enlargement

42TH ST

41TH ST

40TH ST

39TH ST

SKYLINE

LOWER GRT HWY

GRT WHY

SF ZOO

WAW

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truckeemission bay

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roundabouts along skyline

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skyline & great highway

skyline & herbst (north)

skyline & herbst (south)

skyline & sloat

A modern roundabout is an unsignalized, yield-on-entry

circular intersection. Unlike large rotaries and traffic circles, modern roundabout have a small footprint and are designed to reduce vehicle speeds while steadily moving traffic. compared to signalized intersections, modern roundabouts have: ������� fewer conflict points and therefore fewer collisions

��������slower speeds and therefore less severe collisions

��������no stops or signals and therefore move more traffic and save time and fuel

��������short pedestrian crossings, and are therefore safer

for pedestrians

Studies have found that compared to conventional intersections, modern roundabouts result in:

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Where can I see a roundabout in

action?

Owens St, in Mission Bay (built but not fully operational)

Near I-80 and Lincoln Highway, Truckee, CA

Sources:

National Cooperative Highway Research Program (NCHRP)

Insurance Institute for Highway Safety (IIHS)

Federal Highway Administration (FHWA)

why roundabouts work

what is a modern roundabout?

roundabouts by the numbers

“Roundabouts perform better in terms of safety than other intersection forms… roundabouts have reduced crash frequencies for a wide range of settings…” (NCHRP 67) “…a roundabout will provide better operational performance than a signal in terms of stops, delay, fuel consumption, and pollution emissions.” – (FHWA)

vehicle conflict points

vehicle-pedestrian conflict points

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lower grt hwy park

ocean beach dunes

GRT HW

Y

view 1: narrowed great highway looking north

section A: great highway at vicente

proposed 2 lane grt hwy + perpendicular parking proposed 2 lane grt hwy + perpendicular parking

great highway north of sloat

pros:

��LPSURYHG�VDIHW\��EHWWHU�FRQQHFWLRQ�IURP�6XQVHW�QHLJKERUKRRG�WR�EHDFK��IUHTXHQW�DQG�VKRUWHU�FURVVZDONV��FRPSOHWH�JDSV�LQ�FRDVWDO�SURPHQDGH��PRUH�FRDVWDO�DFFHVV�SDUNLQJ���DGGLWLRQDO�VSDFH�IRU�FRDVWDO�UHWUHDW�GXQH�UHVWRUDWLRQ��D�EHWWHU�VFHQLF�GULYLQJ�H[SHULHQFH�ZLWK�QR�UHG�OLJKWV

proposed parallel parking

proposed perpendicular parking

great highway narrowed to two lanes

section A: great highway at vicente (enlargement)section A: great highway at vicente (enlargement)

section enlargement

cons:

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chicane example: presidio

proposal: Reconceive the Great Highway between Sloat and Lincoln as a coastal access road. Narrow from 4

lanes to 2, allowing frequent, unsignalized crossings from the Sunset with traffic-calming “chicanes”, additional

parking, a complete oceanfront promenade, and expansion and restoration of dune ecosystem.

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coastal trail south of sloat boulevard

proposal: over a decade or more, gradually close the Great Highway aouth of Sloat Boulevard, allowing better

erosion management, improved beach access, and a spectacular roadless coastal trail connecting to Fort

Funston and Lake Merced.

See Open Space Project for more information

pros:

��6SHFWDFXODU�URDGOHVV�FRDVWDO�WUDLO�IRU�hikers and cyclists

��$OORZV�PRUH�IOH[LEOH�HURVLRQ�PDQDJHPHQW��HQVXULQJ�DQ�accessible, ecologically functional beach South of Sloat

��&RQQHFWV�2FHDQ�%HDFK��6)=RR��)RUW�)XQVWRQ��DQG�/DNH�Merced, filling major gaps among open spaces and the CA Coastal Trail.

��(VWDEOLVKHV�UHOLDEOH�1RUWK�6RXWK�WUDIILF�URXWH��eliminating

most closures

��$OORZV�coastal access from Ocean Beach promenade and along Sloat multi-use path with no street crossings

��$OORZV�UHPRYDO�RI�DVSKDOW�DQG�restoration of bluff top

vegetation.

��$OORZ�SFZoo connection to coastal ecosystem, extending their conservation mission

cons:

��5HTXLUHV�VLJQLILFDQW�URDGZD\�DQG�LQWHUVHFWLRQ�improvements as noted throughout.

��6LJQLILFDQW�FRVW�WR�RYHUDOO�LPSURYHPHQW�SURJUDP

��&RDVWDO�DFFHVV�SDUNLQJ�ZLOO�EH�IDUWKHU�IURP�WKH�EHDFK

Coastal gateway and trail

Devils Slide Trail

Ventura Coastal Trail

Long term vision for Coastal Trail

Current coastal condition

enlargement area