US Bridges

IH 45 NB over SH 242

Good

Montgomery County, Texas · 2.1 MI S of FM 1488 · Structure no. 121700011004134

Built
1991
34 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
350 ft
4 main spans
Daily traffic
170,688
2023 count
Owner
State
State Highway Agency

About this bridge

IH 45 NB over SH 242 is a prestressed concrete stringer/multi-beam or girder carrying IH 45 NB over SH 242 in Montgomery County, Texas. It was built in 1991, so it is 34 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 170,688 vehicles a day, roughly 11% of them trucks, projected to reach 238,963 by 2042. The structure is 350 ft (106.7 m) long and 73 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesIH 45 NB
CrossesSH 242
Location2.1 MI S of FM 1488
RouteInterstate 45
StateTexas
Coordinates30.20739, -95.45607
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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length350 ft (106.7 m)
Longest span90 ft (27.4 m)
Deck width73 ft (22.2 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic170,688 (2023)
Projected traffic238,963 by 2042
Trucks11%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
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 NB over SH 242 built?

It was built in 1991, making it 34 years old in 2025.

What condition is IH 45 NB over SH 242 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 August 2024.

How much traffic does IH 45 NB over SH 242 carry?

About 170,688 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is IH 45 NB over SH 242?

The structure is 350 ft (106.7 m) long with a longest span of 90 ft (27.4 m) and a deck 73 ft wide.

Who owns IH 45 NB over SH 242?

It is owned by the State Highway Agency.