US Bridges

101N -1S Connector over State Route 1

Fair

San Francisco County, California · 04-SF-101-R9.40-SF · Structure no. 34 0159G

Built
2015
10 years old
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
199 ft
3 main spans
Daily traffic
20,000
2015 count
Owner
State
State Highway Agency

About this bridge

101N -1S Connector over State Route 1 is a prestressed concrete continuous box beam or girders - multiple carrying 101N -1S Connector over State Route 1 in San Francisco County, California. It was built in 2015, so it is 10 years old, younger 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 6 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 20,000 vehicles a day, roughly 1% of them trucks, projected to reach 31,326 by 2045. The structure is 199 ft (60.7 m) long and 31 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

Location

Open in Google Maps
Carries101N -1S Connector
CrossesState Route 1
Location04-SF-101-R9.40-SF
RouteU.S. Route 101
CountySan Francisco County
StateCalifornia
Coordinates37.80333, -122.46944
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length199 ft (60.7 m)
Longest span101 ft (30.8 m)
Deck width31 ft (9.6 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,000 (2015)
Projected traffic31,326 by 2045
Trucks1%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed5.6 mi (9 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate 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 101N -1S Connector over State Route 1 built?

It was built in 2015, making it 10 years old in 2025.

What condition is 101N -1S Connector over State Route 1 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 March 2023.

How much traffic does 101N -1S Connector over State Route 1 carry?

About 20,000 vehicles per day (2015 count), of which roughly 1% are trucks.

How long is 101N -1S Connector over State Route 1?

The structure is 199 ft (60.7 m) long with a longest span of 101 ft (30.8 m) and a deck 31 ft wide.

Who owns 101N -1S Connector over State Route 1?

It is owned by the State Highway Agency.