US Bridges

US 15B over US 15/US 40

Good

Frederick County, Maryland · 0.39 Mile North of Md 180 · Structure no. 100000100102010

Built
1955
70 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
225 ft
4 main spans
Daily traffic
45,900
2006 count
Owner
State
State Highway Agency

About this bridge

US 15B over US 15/US 40 is a steel stringer/multi-beam or girder carrying US 15B over US 15/US 40 in Frederick County, Maryland. It was built in 1955, so it is 70 years old, older than the Maryland average of 52.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 45,900 vehicles a day, roughly 8% of them trucks, projected to reach 52,923 by 2026. The structure is 225 ft (68.6 m) long and 103 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesUS 15B
CrossesUS 15/US 40
Location0.39 Mile North of Md 180
RouteU.S. Route 15B
CountyFrederick County
StateMaryland
Coordinates39.40585, -77.43322
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83 US tons
Inventory rating49.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length225 ft (68.6 m)
Longest span75 ft (22.9 m)
Deck width103 ft (31.3 m)
Roadway width94 ft (28.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45,900 (2006)
Projected traffic52,923 by 2026
Trucks8%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.5 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 15B over US 15/US 40 built?

It was built in 1955, making it 70 years old in 2025.

What condition is US 15B over US 15/US 40 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.

How much traffic does US 15B over US 15/US 40 carry?

About 45,900 vehicles per day (2006 count), of which roughly 8% are trucks.

How long is US 15B over US 15/US 40?

The structure is 225 ft (68.6 m) long with a longest span of 75 ft (22.9 m) and a deck 103 ft wide.

Who owns US 15B over US 15/US 40?

It is owned by the State Highway Agency.