US Bridges

IH 45 NB over IH 45 NB Houston Exit

Good

Harris County, Texas · 0.30 MI N of Dallas ST · Structure no. 121020050003107

Built
1962
63 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
76 ft
1 main span
Daily traffic
230,232
2019 count
Owner
State
State Highway Agency

About this bridge

IH 45 NB over IH 45 NB Houston Exit is a steel stringer/multi-beam or girder carrying IH 45 NB over IH 45 NB Houston Exit in Harris County, Texas. It was built in 1962, so it is 63 years old, older 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 230,232 vehicles a day, roughly 7% of them trucks, projected to reach 151,100 by 2033. The structure is 76 ft (23.2 m) long and 42 ft wide.

CarriesIH 45 NB
CrossesIH 45 NB Houston Exit
Location0.30 MI N of Dallas ST
RouteInterstate 45
StateTexas
Coordinates29.76221, -95.37224
Functional classUrban 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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.9 US tons
Inventory rating38 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length76 ft (23.2 m)
Longest span75 ft (22.9 m)
Deck width42 ft (12.8 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic230,232 (2019)
Projected traffic151,100 by 2033
Trucks7%
Lanes on structure3
Traffic directionOne-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 statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$8,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was IH 45 NB over IH 45 NB Houston Exit built?

It was built in 1962, making it 63 years old in 2025.

What condition is IH 45 NB over IH 45 NB Houston Exit 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 IH 45 NB over IH 45 NB Houston Exit carry?

About 230,232 vehicles per day (2019 count), of which roughly 7% are trucks.

How long is IH 45 NB over IH 45 NB Houston Exit?

The structure is 76 ft (23.2 m) long with a longest span of 75 ft (22.9 m) and a deck 42 ft wide.

Who owns IH 45 NB over IH 45 NB Houston Exit?

It is owned by the State Highway Agency.