US Bridges

Dallas N Tollway over Maple Ave & Knight ST

Fair

Dallas County, Texas · At Knight ST Intersection · Structure no. 1805709D0470003

Built
1965
60 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
303 ft
1 main span
Daily traffic
78,334
2017 count
Owner
Toll Authority
Local Toll Authority

About this bridge

Dallas N Tollway over Maple Ave & Knight ST is a steel continuous stringer/multi-beam or girder carrying Dallas N Tollway over Maple Ave & Knight ST in Dallas County, Texas. It was built in 1965, so it is 60 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 78,334 vehicles a day, roughly 3% of them trucks, projected to reach 109,670 by 2037. The structure is 303 ft (92.4 m) long and 98 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesDallas N Tollway
CrossesMaple Ave & Knight ST
LocationAt Knight ST Intersection
CountyDallas County
StateTexas
Coordinates32.80745, -96.81781
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans1 (+3 approach)
Design loadHS 20
Structure length303 ft (92.4 m)
Longest span100 ft (30.5 m)
Deck width98 ft (30 m)
Roadway width94 ft (28.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic78,334 (2017)
Projected traffic109,670 by 2037
Trucks3%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerLocal Toll Authority
Maintained byLocal Toll Authority
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 Dallas N Tollway over Maple Ave & Knight ST built?

It was built in 1965, making it 60 years old in 2025.

What condition is Dallas N Tollway over Maple Ave & Knight ST 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 February 2023.

How much traffic does Dallas N Tollway over Maple Ave & Knight ST carry?

About 78,334 vehicles per day (2017 count), of which roughly 3% are trucks.

How long is Dallas N Tollway over Maple Ave & Knight ST?

The structure is 303 ft (92.4 m) long with a longest span of 100 ft (30.5 m) and a deck 98 ft wide.

Who owns Dallas N Tollway over Maple Ave & Knight ST?

It is owned by the Local Toll Authority.