US Bridges

S280-S101 Connectr over N101-N280 Connector Ramp

Poor

San Francisco County, California · 04-SF-280-R4.07L-SF · Structure no. 34 0070E

Built
1966
59 years old
Condition
Poor
inspected March 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
1,154 ft
14 main spans
Daily traffic
40,000
2019 count
Owner
State
State Highway Agency

About this bridge

S280-S101 Connectr over N101-N280 Connector Ramp is a concrete continuous box beam or girders - multiple carrying S280-S101 Connectr over N101-N280 Connector Ramp in San Francisco County, California. It was built in 1966, so it is 59 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 40,000 vehicles a day, roughly 3% of them trucks, projected to reach 107,238 by 2041. The structure is 1,154 ft (351.7 m) long and 38 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesS280-S101 Connectr
CrossesN101-N280 Connector Ramp
Location04-SF-280-R4.07L-SF
RouteInterstate 280
Coordinates37.73274, -122.40472
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.6 US tons
Inventory rating50.4 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans14
Design loadHS 20
Structure length1,154 ft (351.7 m)
Longest span100 ft (30.5 m)
Deck width38 ft (11.6 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40,000 (2019)
Projected traffic107,238 by 2041
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesThird level (interchange)
CrossesHighway
Detour if closed3.1 mi (5 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 S280-S101 Connectr over N101-N280 Connector Ramp built?

It was built in 1966, making it 59 years old in 2025.

What condition is S280-S101 Connectr over N101-N280 Connector Ramp in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2024.

How much traffic does S280-S101 Connectr over N101-N280 Connector Ramp carry?

About 40,000 vehicles per day (2019 count), of which roughly 3% are trucks.

How long is S280-S101 Connectr over N101-N280 Connector Ramp?

The structure is 1,154 ft (351.7 m) long with a longest span of 100 ft (30.5 m) and a deck 38 ft wide.

Who owns S280-S101 Connectr over N101-N280 Connector Ramp?

It is owned by the State Highway Agency.