US Bridges

US 29 NB over US 29 Ramp a (07)

Fair

Howard County, Maryland · 0.29 Mile South of US 40 · Structure no. 100000130008010

Built
1966
59 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
180 ft
3 main spans
Daily traffic
130,203
2009 count
Owner
State
State Highway Agency

About this bridge

US 29 NB over US 29 Ramp a (07) is a steel stringer/multi-beam or girder carrying US 29 NB over US 29 Ramp a (07) in Howard County, Maryland. It was built in 1966, so it is 59 years old, older than the Maryland average of 52.6 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 130,203 vehicles a day, roughly 8% of them trucks, projected to reach 77,384 by 2026. The structure is 180 ft (54.9 m) long and 52 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesUS 29 NB
CrossesUS 29 Ramp a (07)
Location0.29 Mile South of US 40
RouteU.S. Route 29
CountyHoward County
StateMaryland
Coordinates39.27366, -76.81813
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating94 US tons
Inventory rating56 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length180 ft (54.9 m)
Longest span79 ft (24.1 m)
Deck width52 ft (15.9 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic130,203 (2009)
Projected traffic77,384 by 2026
Trucks8%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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$1.2 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 29 NB over US 29 Ramp a (07) built?

It was built in 1966, making it 59 years old in 2025.

What condition is US 29 NB over US 29 Ramp a (07) 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 October 2023.

How much traffic does US 29 NB over US 29 Ramp a (07) carry?

About 130,203 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is US 29 NB over US 29 Ramp a (07)?

The structure is 180 ft (54.9 m) long with a longest span of 79 ft (24.1 m) and a deck 52 ft wide.

Who owns US 29 NB over US 29 Ramp a (07)?

It is owned by the State Highway Agency.