US Bridges

State Route 1 over Lakeshire Drive

Fair

San Mateo County, California · 04-SM-001-R46.86-DLC · Structure no. 35 0206

Built
1972
53 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
178 ft
1 main span
Daily traffic
65,000
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 1 over Lakeshire Drive is a prestressed concrete box beam or girders - multiple carrying State Route 1 over Lakeshire Drive in San Mateo County, California. It was built in 1972, so it is 53 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 65,000 vehicles a day, roughly 2% of them trucks, projected to reach 96,420 by 2042. The structure is 178 ft (54.4 m) long and 182 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesState Route 1
CrossesLakeshire Drive
Location04-SM-001-R46.86-DLC
RouteState Highway 1
CountySan Mateo County
StateCalifornia
Coordinates37.66986, -122.48326
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating109.7 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length178 ft (54.4 m)
Longest span174 ft (52.9 m)
Deck width182 ft (55.5 m)
Roadway width167 ft (50.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic65,000 (2009)
Projected traffic96,420 by 2042
Trucks2%
Lanes on structure9
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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 State Route 1 over Lakeshire Drive built?

It was built in 1972, making it 53 years old in 2025.

What condition is State Route 1 over Lakeshire Drive 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 October 2024.

How much traffic does State Route 1 over Lakeshire Drive carry?

About 65,000 vehicles per day (2009 count), of which roughly 2% are trucks.

How long is State Route 1 over Lakeshire Drive?

The structure is 178 ft (54.4 m) long with a longest span of 174 ft (52.9 m) and a deck 182 ft wide.

Who owns State Route 1 over Lakeshire Drive?

It is owned by the State Highway Agency.