US Bridges

N101 Cesar Offrmp over SB101 Bayshore Off-Ramp

Fair

San Francisco County, California · 04-SF-101-2.84-SF · Structure no. 34 0047S

Built
1950
75 years old
Condition
Fair
inspected January 2024
Type
Tee Beam
Concrete Continuous
Length
157 ft
3 main spans
Daily traffic
12,200
2018 count
Owner
State
State Highway Agency

About this bridge

N101 Cesar Offrmp over SB101 Bayshore Off-Ramp is a concrete continuous tee beam carrying N101 Cesar Offrmp over SB101 Bayshore Off-Ramp in San Francisco County, California. It was built in 1950, so it is 75 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 12,200 vehicles a day, roughly 4% of them trucks, projected to reach 34,545 by 2046. The structure is 157 ft (47.9 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesN101 Cesar Offrmp
CrossesSB101 Bayshore Off-Ramp
Location04-SF-101-2.84-SF
RouteU.S. Route 101
CountySan Francisco County
StateCalifornia
Coordinates37.74574, -122.40448
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment6: Equal to present minimum criteria
Operating rating43.2 US tons
Inventory rating33.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length157 ft (47.9 m)
Longest span71 ft (21.6 m)
Deck width30 ft (9.2 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,200 (2018)
Projected traffic34,545 by 2046
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was N101 Cesar Offrmp over SB101 Bayshore Off-Ramp built?

It was built in 1950, making it 75 years old in 2025.

What condition is N101 Cesar Offrmp over SB101 Bayshore Off-Ramp in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2024.

How much traffic does N101 Cesar Offrmp over SB101 Bayshore Off-Ramp carry?

About 12,200 vehicles per day (2018 count), of which roughly 4% are trucks.

How long is N101 Cesar Offrmp over SB101 Bayshore Off-Ramp?

The structure is 157 ft (47.9 m) long with a longest span of 71 ft (21.6 m) and a deck 30 ft wide.

Who owns N101 Cesar Offrmp over SB101 Bayshore Off-Ramp?

It is owned by the State Highway Agency.