US Bridges

I 55 Ramp a over Ramp B at High ST

Fair

Hinds County, Mississippi · 1.8 MI N Int I 55 I 20 · Structure no. 170005502509490

Built
1967
58 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
408 ft
4 main spans
Daily traffic
3,200
2023 count
Owner
State
State Highway Agency

About this bridge

I 55 Ramp a over Ramp B at High ST is a concrete continuous box beam or girders - single or spread carrying I 55 Ramp a over Ramp B at High ST in Hinds County, Mississippi. It was built in 1967, so it is 58 years old, older than the Mississippi average of 38.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 3,200 vehicles a day, roughly 18% of them trucks, projected to reach 3,500 by 2043. The structure is 408 ft (124.4 m) long and 32 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 55 Ramp a
CrossesRamp B at High ST
Location1.8 MI N Int I 55 I 20
RouteInterstate 55
Coordinates32.30061, -90.16768
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating72.9 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4 (+2 approach)
Design loadHS 20 + Mod
Structure length408 ft (124.4 m)
Longest span88 ft (26.8 m)
Deck width32 ft (9.7 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,200 (2023)
Projected traffic3,500 by 2043
Trucks18%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1,000 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 55 Ramp a over Ramp B at High ST built?

It was built in 1967, making it 58 years old in 2025.

What condition is I 55 Ramp a over Ramp B at High 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 June 2024.

How much traffic does I 55 Ramp a over Ramp B at High ST carry?

About 3,200 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is I 55 Ramp a over Ramp B at High ST?

The structure is 408 ft (124.4 m) long with a longest span of 88 ft (26.8 m) and a deck 32 ft wide.

Who owns I 55 Ramp a over Ramp B at High ST?

It is owned by the State Highway Agency.