US Bridges

IH 45 over SH 31 Relief Route

Good

Navarro County, Texas · 2.25 MI S of US 287 · Structure no. 181750009301269

Built
2020
5 years old
Condition
Good
inspected March 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,268 ft
12 main spans
Daily traffic
31,400
2020 count
Owner
State
State Highway Agency

About this bridge

IH 45 over SH 31 Relief Route is a prestressed concrete stringer/multi-beam or girder carrying IH 45 over SH 31 Relief Route in Navarro County, Texas. It was built in 2020, so it is 5 years old, younger than the Texas average of 44.4 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 31,400 vehicles a day, roughly 9% of them trucks, projected to reach 50,000 by 2040. The structure is 1,268 ft (386.5 m) long and 116 ft wide.

Location

Open in Google Maps
CarriesIH 45
CrossesSH 31 Relief Route
Location2.25 MI S of US 287
RouteInterstate 45
CountyNavarro County
StateTexas
Coordinates32.0448, -96.44777
Functional classRural Principal Arterial - Interstate

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 inspectionMarch 2022
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 rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans12
Design loadHL 93
Structure length1,268 ft (386.5 m)
Longest span120 ft (36.6 m)
Deck width116 ft (35.4 m)
Roadway width112 ft (34 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,400 (2020)
Projected traffic50,000 by 2040
Trucks9%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 IH 45 over SH 31 Relief Route built?

It was built in 2020, making it 5 years old in 2025.

What condition is IH 45 over SH 31 Relief Route 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 March 2022.

How much traffic does IH 45 over SH 31 Relief Route carry?

About 31,400 vehicles per day (2020 count), of which roughly 9% are trucks.

How long is IH 45 over SH 31 Relief Route?

The structure is 1,268 ft (386.5 m) long with a longest span of 120 ft (36.6 m) and a deck 116 ft wide.

Who owns IH 45 over SH 31 Relief Route?

It is owned by the State Highway Agency.