US Bridges

Al - 4 (us 78) over Morris Ave * R.R.

Good

Jefferson County, Alabama · 24th St. Viaduct · Structure no. 016221

Built
1995
30 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,211 ft
9 main spans
Daily traffic
8,620
2024 count
Owner
State
State Highway Agency

About this bridge

Al - 4 (us 78) over Morris Ave * R.R. is a prestressed concrete stringer/multi-beam or girder carrying Al - 4 (us 78) over Morris Ave * R.R. in Jefferson County, Alabama. It was built in 1995, so it is 30 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 8,620 vehicles a day, roughly 3% of them trucks, projected to reach 13,450 by 2044. The structure is 1,211 ft (369.1 m) long and 72 ft wide.

Location

Open in Google Maps
CarriesAl - 4 (us 78)
CrossesMorris Ave * R.R.
Location24th St. Viaduct
RouteU.S. Route 78
CountyJefferson County
StateAlabama
Coordinates33.51387, -86.79808
Functional classUrban Collector

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 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 alignment8: Equal to present desirable criteria
Operating rating75.2 US tons
Inventory rating32.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans9 (+9 approach)
Design loadHS 20
Structure length1,211 ft (369.1 m)
Longest span100 ft (30.5 m)
Deck width72 ft (21.9 m)
Roadway width57 ft (17.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,620 (2024)
Projected traffic13,450 by 2044
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
Detour if closed—
TollOn a free road
National Highway SystemNo

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$20 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Al - 4 (us 78) over Morris Ave * R.R. built?

It was built in 1995, making it 30 years old in 2025.

What condition is Al - 4 (us 78) over Morris Ave * R.R. 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 2024.

How much traffic does Al - 4 (us 78) over Morris Ave * R.R. carry?

About 8,620 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is Al - 4 (us 78) over Morris Ave * R.R.?

The structure is 1,211 ft (369.1 m) long with a longest span of 100 ft (30.5 m) and a deck 72 ft wide.

Who owns Al - 4 (us 78) over Morris Ave * R.R.?

It is owned by the State Highway Agency.