US Bridges

US 1 over CSX Trans.

Fair

Howard County, Maryland · 0.85 Mile North of Md 32 · Structure no. 100000130099010

Built
1969
56 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
139 ft
3 main spans
Daily traffic
21,992
2009 count
Owner
State
State Highway Agency

About this bridge

US 1 over CSX Trans. is a steel continuous stringer/multi-beam or girder carrying US 1 over CSX Trans. in Howard County, Maryland. It was built in 1969, so it is 56 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 21,992 vehicles a day, roughly 8% of them trucks, projected to reach 24,031 by 2026. The structure is 139 ft (42.4 m) long and 87 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesUS 1
CrossesCSX Trans.
Location0.85 Mile North of Md 32
RouteU.S. Route 1
CountyHoward County
StateMaryland
Coordinates39.14906, -76.80479
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to 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 rating110.1 US tons
Inventory rating66 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length139 ft (42.4 m)
Longest span54 ft (16.5 m)
Deck width87 ft (26.6 m)
Roadway width84 ft (25.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,992 (2009)
Projected traffic24,031 by 2026
Trucks8%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed6.8 mi (11 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 US 1 over CSX Trans. built?

It was built in 1969, making it 56 years old in 2025.

What condition is US 1 over CSX Trans. 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 April 2023.

How much traffic does US 1 over CSX Trans. carry?

About 21,992 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is US 1 over CSX Trans.?

The structure is 139 ft (42.4 m) long with a longest span of 54 ft (16.5 m) and a deck 87 ft wide.

Who owns US 1 over CSX Trans.?

It is owned by the State Highway Agency.