IH 45
IH 45 in 4.75 MI N Of Ih 610, Harris County, Texas received a condition grade of B (62/100). Built in 1959, the bridge carries 225K vehicles daily on IH 45 over Little York RD.
IH 45 carries a B on the BridgeSafety Condition Score with 62/100. Most component ratings are solid; one or two may show wear consistent with the structure’s age, but the bridge is not flagged as structurally deficient.
The bridge was built in 1959 and is now 67 years old, at or past the typical 50-year design life for bridges of its vintage. Maintenance and inspection cycles are correspondingly more involved than for newer structures. IH 45 carries an average daily traffic count of 225,364 vehicles, with 9 lane(s) crossing Little York RD. The owning agency is State Highway Agency; bridge inspection records flow into the federal NBI database annually.
Component Ratings
The riding surface, evaluated for cracking, spalling, and wear
Beams, girders, and trusses that support the deck
Piers, abutments, and foundations below the deck
Bridge Details
About This Bridge
IH 45 is a 67-year-old bridge located 4.75 MI N Of Ih 610 in Harris County, Texas. The bridge carries IH 45 over Little York RD with 9 traffic lanes, handling approximately 225K vehicles per day. Built in 1959 and reconstructed in 1980, the structure spans 70.1 meters.
The bridge received a Condition Grade of B (62/100) based on Federal Highway Administration inspection data. Its deck is rated 6/9 (fair), superstructure 7/9 (good), and substructure 6/9 (fair).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
IH 45 has a Condition Score of 62/100 (Grade B). Its deck is rated 6/9, superstructure 7/9, and substructure 6/9 on the NBI scale. The bridge is not classified as structurally deficient.
IH 45 was built in 1959 and reconstructed in 1980, making it 67 years old. The average bridge age in the United States is 48 years.
IH 45 carries approximately 225K vehicles per day (average daily traffic). The bridge has 9 traffic lanes. It is 70.1 meters long and located on IH 45 in 4.75 MI N Of Ih 610, Harris County, Texas.
No, IH 45 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
IH 45 is located 4.75 MI N Of Ih 610 in Harris County, Texas. The bridge carries IH 45 over Little York RD. Its coordinates are 29.869889, -95.407842. It is maintained by State Highway Agency.
IH 45 carries IH 45 over Little York RD. The bridge is 70.1 meters long and was built in 1959, with reconstruction in 1980.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.
Source: FHWA National Bridge Inventory, 2026.