US Bridges

Dallas N Tollwy NB over Alpha Road

Good

Dallas County, Texas · 0.5 MI N of Lbj Frwy · Structure no. 1805709D0470004

Built
1983
42 years old
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
252 ft
3 main spans
Daily traffic
112,278
2018 count
Owner
Toll Authority
Local Toll Authority

About this bridge

Dallas N Tollwy NB over Alpha Road is a prestressed concrete stringer/multi-beam or girder carrying Dallas N Tollwy NB over Alpha Road in Dallas County, Texas. It was built in 1983, so it is 42 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 112,278 vehicles a day, roughly 2% of them trucks, projected to reach 216,130 by 2037. The structure is 252 ft (76.8 m) long and 56 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesDallas N Tollwy NB
CrossesAlpha Road
Location0.5 MI N of Lbj Frwy
CountyDallas County
StateTexas
Coordinates32.93296, -96.82197
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionFebruary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length252 ft (76.8 m)
Longest span96 ft (29.3 m)
Deck width56 ft (17.2 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic112,278 (2018)
Projected traffic216,130 by 2037
Trucks2%
Lanes on structure4
Traffic directionOne-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 statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$31,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Dallas N Tollwy NB over Alpha Road built?

It was built in 1983, making it 42 years old in 2025.

What condition is Dallas N Tollwy NB over Alpha Road 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 February 2023.

How much traffic does Dallas N Tollwy NB over Alpha Road carry?

About 112,278 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is Dallas N Tollwy NB over Alpha Road?

The structure is 252 ft (76.8 m) long with a longest span of 96 ft (29.3 m) and a deck 56 ft wide.

Who owns Dallas N Tollwy NB over Alpha Road?

It is owned by the Local Toll Authority.