US Bridges

University Ave SB over US Highway 101

Fair

San Mateo County, California · 04-SM-101-0.89-EAPA · Structure no. 35 0155

Built
1958
67 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
354 ft
4 main spans
Daily traffic
24,700
2005 count
Owner
State
State Highway Agency

About this bridge

University Ave SB over US Highway 101 is a steel stringer/multi-beam or girder carrying University Ave SB over US Highway 101 in San Mateo County, California. It was built in 1958, so it is 67 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 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 24,700 vehicles a day, roughly 3% of them trucks, projected to reach 52,976 by 2041. The structure is 354 ft (107.9 m) long and 37 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesUniversity Ave SB
CrossesUS Highway 101
Location04-SM-101-0.89-EAPA
RouteCounty Highway 0D342
Coordinates37.46007, -122.14087
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.7 US tons
Inventory rating27.4 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length354 ft (107.9 m)
Longest span111 ft (33.7 m)
Deck width37 ft (11.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,700 (2005)
Projected traffic52,976 by 2041
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

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 University Ave SB over US Highway 101 built?

It was built in 1958, making it 67 years old in 2025.

What condition is University Ave SB over US Highway 101 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 August 2023.

How much traffic does University Ave SB over US Highway 101 carry?

About 24,700 vehicles per day (2005 count), of which roughly 3% are trucks.

How long is University Ave SB over US Highway 101?

The structure is 354 ft (107.9 m) long with a longest span of 111 ft (33.7 m) and a deck 37 ft wide.

Who owns University Ave SB over US Highway 101?

It is owned by the State Highway Agency.