US Bridges

IH 45 SB On-Ramp over IH 45 SB Off-Ramp

Fair

Harris County, Texas · 1.30 MI N of IH 610 · Structure no. 121020050003142

Built
1967
58 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
485 ft
8 main spans
Daily traffic
7,630
2024 count
Owner
State
State Highway Agency

About this bridge

IH 45 SB On-Ramp over IH 45 SB Off-Ramp is a steel stringer/multi-beam or girder carrying IH 45 SB On-Ramp over IH 45 SB Off-Ramp in Harris County, Texas. It was built in 1967, so it is 58 years old, older than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 7,630 vehicles a day, roughly 8% of them trucks, projected to reach 16,269 by 2041. The structure is 485 ft (147.8 m) long and 23 ft wide.

Location

Open in Google Maps
CarriesIH 45 SB On-Ramp
CrossesIH 45 SB Off-Ramp
Location1.30 MI N of IH 610
RouteState Highway 45
CountyHarris County
StateTexas
Coordinates29.83018, -95.3823
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans8
Design loadH 20
Structure length485 ft (147.8 m)
Longest span60 ft (18.3 m)
Deck width23 ft (7.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,630 (2024)
Projected traffic16,269 by 2041
Trucks8%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

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$24,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was IH 45 SB On-Ramp over IH 45 SB Off-Ramp built?

It was built in 1967, making it 58 years old in 2025.

What condition is IH 45 SB On-Ramp over IH 45 SB Off-Ramp in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2024.

How much traffic does IH 45 SB On-Ramp over IH 45 SB Off-Ramp carry?

About 7,630 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is IH 45 SB On-Ramp over IH 45 SB Off-Ramp?

The structure is 485 ft (147.8 m) long with a longest span of 60 ft (18.3 m) and a deck 23 ft wide.

Who owns IH 45 SB On-Ramp over IH 45 SB Off-Ramp?

It is owned by the State Highway Agency.