US Bridges

Airport Term Off-R over US 101

Fair

San Mateo County, California · H16 to A26 of 35 0275K · Structure no. 35C0178

Built
1987
38 years old
Condition
Fair
inspected January 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
404 ft
3 main spans
Daily traffic
19,252
2010 count
Owner
Local
Other Local Agency

About this bridge

Airport Term Off-R over US 101 is a concrete continuous box beam or girders - multiple carrying Airport Term Off-R over US 101 in San Mateo County, California. It was built in 1987, so it is 38 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 19,252 vehicles a day, roughly 5% of them trucks, projected to reach 25,304 by 2042. The structure is 404 ft (123 m) long and 41 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesAirport Term Off-R
CrossesUS 101
LocationH16 to A26 of 35 0275K
CountySan Mateo County
StateCalifornia
Coordinates37.61393, -122.39524
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3 (+7 approach)
Design loadHS 20 + Mod
Structure length404 ft (123 m)
Longest span110 ft (33.5 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deck18 ft (5.4 m)

Traffic and service

Average daily traffic19,252 (2010)
Projected traffic25,304 by 2042
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local 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 Airport Term Off-R over US 101 built?

It was built in 1987, making it 38 years old in 2025.

What condition is Airport Term Off-R over US 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 January 2024.

How much traffic does Airport Term Off-R over US 101 carry?

About 19,252 vehicles per day (2010 count), of which roughly 5% are trucks.

How long is Airport Term Off-R over US 101?

The structure is 404 ft (123 m) long with a longest span of 110 ft (33.5 m) and a deck 41 ft wide.

Who owns Airport Term Off-R over US 101?

It is owned by the Other Local Agency.