US Bridges

Derby Pkwy over Alton Road

Good

Jefferson County, Alabama · Derby Pkwy* ALTON@I459 · Structure no. 018288

Built
1993
32 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
142 ft
3 main spans
Daily traffic
2,000
2018 count
Owner
City
City or Municipal Highway Agency

About this bridge

Derby Pkwy over Alton Road is a steel stringer/multi-beam or girder carrying Derby Pkwy over Alton Road in Jefferson County, Alabama. It was built in 1993, so it is 32 years old, younger than the Alabama average of 51.1 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 2,000 vehicles a day, roughly 5% of them trucks, projected to reach 3,000 by 2038. The structure is 142 ft (43.3 m) long and 87 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesDerby Pkwy
CrossesAlton Road
LocationDerby Pkwy* ALTON@I459
RouteCity Street 176
CountyJefferson County
StateAlabama
Coordinates33.57278, -86.64111
Functional classUrban Local

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 inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating51.8 US tons
Inventory rating31 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length142 ft (43.3 m)
Longest span60 ft (18.3 m)
Deck width87 ft (26.4 m)
Roadway width84 ft (25.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2018)
Projected traffic3,000 by 2038
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$3.4 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Derby Pkwy over Alton Road built?

It was built in 1993, making it 32 years old in 2025.

What condition is Derby Pkwy over Alton 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 March 2024.

How much traffic does Derby Pkwy over Alton Road carry?

About 2,000 vehicles per day (2018 count), of which roughly 5% are trucks.

How long is Derby Pkwy over Alton Road?

The structure is 142 ft (43.3 m) long with a longest span of 60 ft (18.3 m) and a deck 87 ft wide.

Who owns Derby Pkwy over Alton Road?

It is owned by the City or Municipal Highway Agency.