US Bridges

IH45 SB Hov Onramp over IH 45 Sbml

Fair

Harris County, Texas · 0.5 MI N of West RD · Structure no. 121020011006103

Built
1989
36 years old
Condition
Fair
inspected August 2024
Type
Box Beam or Girders - Single or Spread
Steel Continuous
Length
560 ft
2 main spans
Daily traffic
3,148
2021 count
Owner
State
State Highway Agency

About this bridge

IH45 SB Hov Onramp over IH 45 Sbml is a steel continuous box beam or girders - single or spread carrying IH45 SB Hov Onramp over IH 45 Sbml in Harris County, Texas. It was built in 1989, so it is 36 years old, younger 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 6 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 3,148 vehicles a day, roughly 5% of them trucks, projected to reach 4,409 by 2041. The structure is 560 ft (170.7 m) long and 23 ft wide.

Location

Open in Google Maps
CarriesIH45 SB Hov Onramp
CrossesIH 45 Sbml
Location0.5 MI N of West RD
RouteState Highway 45
CountyHarris County
StateTexas
Coordinates29.91968, -95.41268
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length560 ft (170.7 m)
Longest span222 ft (67.7 m)
Deck width23 ft (6.9 m)
Roadway width20 ft (6 m)
Vertical clearance over deck17 ft (5.2 m)

Traffic and service

Average daily traffic3,148 (2021)
Projected traffic4,409 by 2041
Trucks5%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo
Strategic Highway NetworkNon-Interstate 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 IH45 SB Hov Onramp over IH 45 Sbml built?

It was built in 1989, making it 36 years old in 2025.

What condition is IH45 SB Hov Onramp over IH 45 Sbml 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 IH45 SB Hov Onramp over IH 45 Sbml carry?

About 3,148 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is IH45 SB Hov Onramp over IH 45 Sbml?

The structure is 560 ft (170.7 m) long with a longest span of 222 ft (67.7 m) and a deck 23 ft wide.

Who owns IH45 SB Hov Onramp over IH 45 Sbml?

It is owned by the State Highway Agency.