US Bridges

Md 175 EB over US 29

Fair

Howard County, Maryland · 4.06 Miles N of Md 108 · Structure no. 100000130086013

Built
1973
52 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
268 ft
2 main spans
Daily traffic
22,557
2018 count
Owner
State
State Highway Agency

About this bridge

Md 175 EB over US 29 is a steel continuous stringer/multi-beam or girder carrying Md 175 EB over US 29 in Howard County, Maryland. It was built in 1973, so it is 52 years old, younger 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 22,557 vehicles a day, roughly 8% of them trucks, projected to reach 22,653 by 2038. The structure is 268 ft (81.7 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMd 175 EB
CrossesUS 29
Location4.06 Miles N of Md 108
RouteState Highway 175
CountyHoward County
StateMaryland
Coordinates39.2255, -76.84533
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 inspectionFebruary 2024
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 rating59 US tons
Inventory rating35.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length268 ft (81.7 m)
Longest span96 ft (29.3 m)
Deck width50 ft (15.3 m)
Roadway width47 ft (14.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,557 (2018)
Projected traffic22,653 by 2038
Trucks8%
Lanes on structure2
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Md 175 EB over US 29 built?

It was built in 1973, making it 52 years old in 2025.

What condition is Md 175 EB over US 29 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 February 2024.

How much traffic does Md 175 EB over US 29 carry?

About 22,557 vehicles per day (2018 count), of which roughly 8% are trucks.

How long is Md 175 EB over US 29?

The structure is 268 ft (81.7 m) long with a longest span of 96 ft (29.3 m) and a deck 50 ft wide.

Who owns Md 175 EB over US 29?

It is owned by the State Highway Agency.