US Bridges

Zzyzx Road over Interstate 15

Good

San Bernardino County, California · 08-SBD-015-R130.18 · Structure no. 54 0398

Built
1965
60 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
257 ft
4 main spans
Daily traffic
150
2023 count
Owner
State
State Highway Agency

About this bridge

Zzyzx Road over Interstate 15 is a steel stringer/multi-beam or girder carrying Zzyzx Road over Interstate 15 in San Bernardino County, California. It was built in 1965, so it is 60 years old, older 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 150 vehicles a day, roughly 5% of them trucks, projected to reach 205 by 2045. The structure is 257 ft (78.2 m) long and 34 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesZzyzx Road
CrossesInterstate 15
Location08-SBD-015-R130.18
RouteCounty Highway 0
Coordinates35.19599, -116.14121
Functional classRural Minor 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 inspectionNovember 2023
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 rating97.1 US tons
Inventory rating58.2 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length257 ft (78.2 m)
Longest span86 ft (26.2 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2023)
Projected traffic205 by 2045
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

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 Zzyzx Road over Interstate 15 built?

It was built in 1965, making it 60 years old in 2025.

What condition is Zzyzx Road over Interstate 15 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 November 2023.

How much traffic does Zzyzx Road over Interstate 15 carry?

About 150 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Zzyzx Road over Interstate 15?

The structure is 257 ft (78.2 m) long with a longest span of 86 ft (26.2 m) and a deck 34 ft wide.

Who owns Zzyzx Road over Interstate 15?

It is owned by the State Highway Agency.