Treasure Island Development Program
Item 6: Hillcrest Update
Infrastructure and Transportation
May 18, 2016
Treasure Island Development Authority
Hillcrest Circulation
Treasure Island Development Authority
Hillcrest Circulation
Treasure Island Development Authority
East-Bound Ramp Interchange
Treasure Island Development Authority
Current Southgate Road Plan
SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY
Current Plan Deficiencies
• Queue spillback onto I-80 from EB off-ramp
• Southgate/Hillcrest – LOS F
• Truck turning geometry
• Bike/ped - vehicle conflict at SFOBB Landing
• No permanent public parking @ SFOBB
Bike/Ped Landing
SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY
East-Bound Ramp Interchange
Treasure Island Development Authority
Proposed Southgate Road Realignment
SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY
Proposal Benefits
• Reduces queuing onto I-80 from EB off-ramp
• Southgate/Hillcrest - LOS A
• Accommodates truck turning movements
• Eliminates bike/ped - vehicle conflict
• Permanent public parking for SFOBB Bike/Ped
Landing
SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY
YBI Circulation – Current Plan
SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY
10
YBI Circulation w/ One-Way Hillcrest
HILLCREST
ROAD
One-Way
EB I-80 Off-Ramp
to
Southgate Road
SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY
11
YBI Circulation w/ One-Way Hillcrest
I-80 WB Ramps
Temporary
Vista Point
Macalla Road
Southgate
Realignment
West-Side Bridges
Retaining Walls
SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY
12
Potential Benefits of One-Way Hillcrest
• Accommodates two-way bicycle and pedestrian
facilities along Treasure Island and Hillcrest Road
• Circulation around entire YBI with Macalla Road
• Direct Connection to SFOBB East Span Bike/Ped
• Adaptable for future SFOBB West Span Bike/Ped
• Eliminates vehicle conflicts from Vista Point access
SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY
13
Potential Benefits of One-Way Hillcrest
• Could accommodate a Transit Priority Lane
• Direct Access from Treasure Island Multimodal
Station to Bus-only WB I-80 On-ramp
• Provides significant bypass for buses destined to
EB I-80 On-ramp
• Facilitates YBI Shuttle Bus
SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY
14
Next Steps
• On May 12th, the Bay Bridge Project Oversight Committee
directed staff to delete the current Southgate Design from the
Caltrans construction contract
• Met with SFCTA, SFMTA and DPW on May 13th to discuss
proposed concepts
• Continue working with SFCTA, Caltrans & BATA to fund the
alternate interchange design
• SFCTA proposed to deliver
• Continue working with core team – SFCTA, Caltrans, TICD,
USCG, & SFMTA – to assess alternate configuration
• Optimize function/operation
• Assess delivery/implementation
• Review property implications with USCG
Treasure Island Development Authority
Questions / Discussion
Treasure Island Development Authority