US Bridges

Airport Term On-Rp over US 101

Fair

San Mateo County, California · Ramp to RTE SB 101 · Structure no. 35C0179K

Built
1996
29 years old
Condition
Fair
inspected January 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
1,407 ft
9 main spans
Daily traffic
23,880
2010 count
Owner
Local
Other Local Agency

About this bridge

Airport Term On-Rp over US 101 is a prestressed concrete continuous box beam or girders - multiple carrying Airport Term On-Rp over US 101 in San Mateo County, California. It was built in 1996, so it is 29 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 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 23,880 vehicles a day, roughly 5% of them trucks, projected to reach 30,034 by 2042. The structure is 1,407 ft (429 m) long and 27 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesAirport Term On-Rp
CrossesUS 101
LocationRamp to RTE SB 101
RouteCity Street 0
CountySan Mateo County
StateCalifornia
Coordinates37.61513, -122.39314
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
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
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans9 (+17 approach)
Design loadHS 20 + Mod
Structure length1,407 ft (429 m)
Longest span140 ft (42.6 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deck15 ft (4.7 m)

Traffic and service

Average daily traffic23,880 (2010)
Projected traffic30,034 by 2042
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 On-Rp over US 101 built?

It was built in 1996, making it 29 years old in 2025.

What condition is Airport Term On-Rp 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 On-Rp over US 101 carry?

About 23,880 vehicles per day (2010 count), of which roughly 5% are trucks.

How long is Airport Term On-Rp over US 101?

The structure is 1,407 ft (429 m) long with a longest span of 140 ft (42.6 m) and a deck 27 ft wide.

Who owns Airport Term On-Rp over US 101?

It is owned by the Other Local Agency.