US Bridges

Airport Road over I 275

Fair

Boone County, Kentucky · Nbl over I-275 Interchang · Structure no. 008B00049R

Built
1972
53 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
222 ft
2 main spans
Daily traffic
6,254
2022 count
Owner
State
State Highway Agency

About this bridge

Airport Road over I 275 is a steel continuous stringer/multi-beam or girder carrying Airport Road over I 275 in Boone County, Kentucky. It was built in 1972, so it is 53 years old, older than the Kentucky average of 46.6 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 6,254 vehicles a day, roughly 20% of them trucks, projected to reach 6,254 by 2042. The structure is 222 ft (67.7 m) long and 52 ft wide.

Location

Open in Google Maps
CarriesAirport Road
CrossesI 275
LocationNbl over I-275 Interchang
RouteState Highway 212
CountyBoone County
StateKentucky
Coordinates39.07056, -84.65444
Functional classUrban Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58 US tons
Inventory rating34.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length222 ft (67.7 m)
Longest span111 ft (33.8 m)
Deck width52 ft (15.8 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,254 (2022)
Projected traffic6,254 by 2042
Trucks20%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Airport Road over I 275 built?

It was built in 1972, making it 53 years old in 2025.

What condition is Airport Road over I 275 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 2023.

How much traffic does Airport Road over I 275 carry?

About 6,254 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is Airport Road over I 275?

The structure is 222 ft (67.7 m) long with a longest span of 111 ft (33.8 m) and a deck 52 ft wide.

Who owns Airport Road over I 275?

It is owned by the State Highway Agency.