US Bridges

IH 20 WB over Willoughby Ave

Fair

Dallas County, Texas · 0.4 MI W of IH 35E · Structure no. 180570237403177

Built
1974
51 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
153 ft
3 main spans
Daily traffic
86,049
2023 count
Owner
State
State Highway Agency

About this bridge

IH 20 WB over Willoughby Ave is a prestressed concrete stringer/multi-beam or girder carrying IH 20 WB over Willoughby Ave in Dallas County, Texas. It was built in 1974, so it is 51 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 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 86,049 vehicles a day, roughly 10% of them trucks, projected to reach 109,050 by 2033. The structure is 153 ft (46.6 m) long and 96 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesIH 20 WB
CrossesWilloughby Ave
Location0.4 MI W of IH 35E
RouteInterstate 20
CountyDallas County
StateTexas
Coordinates32.6423, -96.82937
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length153 ft (46.6 m)
Longest span54 ft (16.5 m)
Deck width96 ft (29.2 m)
Roadway width94 ft (28.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic86,049 (2023)
Projected traffic109,050 by 2033
Trucks10%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was IH 20 WB over Willoughby Ave built?

It was built in 1974, making it 51 years old in 2025.

What condition is IH 20 WB over Willoughby Ave 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 September 2023.

How much traffic does IH 20 WB over Willoughby Ave carry?

About 86,049 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is IH 20 WB over Willoughby Ave?

The structure is 153 ft (46.6 m) long with a longest span of 54 ft (16.5 m) and a deck 96 ft wide.

Who owns IH 20 WB over Willoughby Ave?

It is owned by the State Highway Agency.