US Bridges

Grand Ave over Transit Tunnel

Good

Los Angeles County, California · Betw. 3rd ST & 4th ST · Structure no. 53C1827

Built
1982
43 years old
Condition
Good
inspected August 2022
Type
Slab
Concrete
Length
31 ft
1 main span
Daily traffic
8,212
2018 count
Owner
City
City or Municipal Highway Agency

About this bridge

Grand Ave over Transit Tunnel is a concrete slab carrying Grand Ave over Transit Tunnel in Los Angeles County, California. It was built in 1982, so it is 43 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 8,212 vehicles a day, roughly 2% of them trucks, projected to reach 10,582 by 2040. The structure is 31 ft (9.4 m) long and 84 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesGrand Ave
CrossesTransit Tunnel
LocationBetw. 3rd ST & 4th ST
RouteCity Street 0
CountyLos Angeles County
StateCalifornia
Coordinates34.05142, -118.25254
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating35.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span28 ft (8.5 m)
Deck width84 ft (25.6 m)
Roadway width62 ft (18.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,212 (2018)
Projected traffic10,582 by 2040
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesPedestrian / bicycle
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Grand Ave over Transit Tunnel built?

It was built in 1982, making it 43 years old in 2025.

What condition is Grand Ave over Transit Tunnel in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2022.

How much traffic does Grand Ave over Transit Tunnel carry?

About 8,212 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is Grand Ave over Transit Tunnel?

The structure is 31 ft (9.4 m) long with a longest span of 28 ft (8.5 m) and a deck 84 ft wide.

Who owns Grand Ave over Transit Tunnel?

It is owned by the City or Municipal Highway Agency.