US Bridges

Interstate 40 over "l" Street

Fair

San Bernardino County, California · 08-SBD-040-R142.20-NED · Structure no. 54 0820L

Built
1973
52 years old
Condition
Fair
inspected March 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
150 ft
1 main span
Daily traffic
7,350
2019 count
Owner
State
State Highway Agency

About this bridge

Interstate 40 over "l" Street is a prestressed concrete box beam or girders - multiple carrying Interstate 40 over "l" Street in San Bernardino County, California. It was built in 1973, so it is 52 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 7,350 vehicles a day, roughly 46% of them trucks, projected to reach 9,179 by 2047. The structure is 150 ft (45.7 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 40
Crosses"l" Street
Location08-SBD-040-R142.20-NED
RouteInterstate 40
Coordinates34.84203, -114.61243
Functional classUrban Principal Arterial - Interstate

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 inspectionMarch 2025
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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.8 US tons
Inventory rating41.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length150 ft (45.7 m)
Longest span141 ft (43 m)
Deck width50 ft (15.2 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,350 (2019)
Projected traffic9,179 by 2047
Trucks46%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 Interstate 40 over "l" Street built?

It was built in 1973, making it 52 years old in 2025.

What condition is Interstate 40 over "l" Street 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 2025.

How much traffic does Interstate 40 over "l" Street carry?

About 7,350 vehicles per day (2019 count), of which roughly 46% are trucks.

How long is Interstate 40 over "l" Street?

The structure is 150 ft (45.7 m) long with a longest span of 141 ft (43 m) and a deck 50 ft wide.

Who owns Interstate 40 over "l" Street?

It is owned by the State Highway Agency.