US Bridges

State Route 75 over Interstate 5

Good

San Diego County, California · 11-SD-075-4.62-SD · Structure no. 57 0180

Built
1973
52 years old
Condition
Good
inspected September 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
229 ft
2 main spans
Daily traffic
18,800
2021 count
Owner
State
State Highway Agency

About this bridge

State Route 75 over Interstate 5 is a concrete continuous box beam or girders - multiple carrying State Route 75 over Interstate 5 in San Diego 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 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 18,800 vehicles a day, roughly 3% of them trucks, projected to reach 27,911 by 2041. The structure is 229 ft (69.8 m) long and 93 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesState Route 75
CrossesInterstate 5
Location11-SD-075-4.62-SD
RouteState Highway 75
Coordinates32.58372, -117.08776
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.
Substructure8 Very GoodNo problems noted.
Last inspectionSeptember 2024
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 rating64.6 US tons
Inventory rating49.6 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length229 ft (69.8 m)
Longest span119 ft (36.3 m)
Deck width93 ft (28.3 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deck15 ft (4.6 m)

Traffic and service

Average daily traffic18,800 (2021)
Projected traffic27,911 by 2041
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.1 mi (5 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 75 over Interstate 5 built?

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

What condition is State Route 75 over Interstate 5 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 September 2024.

How much traffic does State Route 75 over Interstate 5 carry?

About 18,800 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is State Route 75 over Interstate 5?

The structure is 229 ft (69.8 m) long with a longest span of 119 ft (36.3 m) and a deck 93 ft wide.

Who owns State Route 75 over Interstate 5?

It is owned by the State Highway Agency.