US 301 SB
Carrying US 301 SB over WESTERN BRANCH
0.12 MILE S OF MD 976C, Prince George's, Maryland
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: US 301 SB
The US 301 SB bridge in Prince George's, Maryland carries US 301 SB over WESTERN BRANCH. It was built in 1949, making it 77 years old today. It was last reconstructed in 1986, extending its service life. The structure is built primarily of steel continuous and spans 3 sections, stretching 43.0 meters (141 feet) end to end. Daily traffic averages 35,812 vehicles, placing it in the heavily-trafficked tier of Maryland bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 6/9, substructure at 6/9. The weakest component sits in fair condition. None of this bridge's reported major components fall into the Poor condition range. Its NBI inventory load rating is 35.8 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How US 301 SB compares
Live comparison across Maryland.
Historical Sufficiency Rating
PlainBridge-computedFHWA discontinued this calculated item; it does not determine current condition, funding eligibility, posting, or closure. How the historical reference is calculated.
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Structural Details
- Year Built
- 1949
- Last Reconstructed
- 1986
- Material
- Steel Continuous
- Number of Spans
- 3
- Structure Length
- 43.0 m (141 ft)
- Deck Width
- 11.1 m (36 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 35,812 vehicles/day
- Structure Number
- 100000160054012
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • At 7/9, the deck (driving surface) is in good shape and shows no significant wear.
- • At 6/9, the superstructure (beams and supports above the deck) shows fair condition, with minor wear flagged for upkeep.
- • The substructure (piers and abutments) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
How to read this record
This page shows what the last federal inspection recorded, not whether US 301 SB is safe to cross today. Here is how to use it.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Learn how the 0–9 condition scale and Good/Fair/Poor categories are defined. How condition ratings work
- Compare US 301 SB against other structures in Prince George's and across Maryland. Maryland bridges
- Noticed visible damage or a safety concern? Report it to the agency that owns the bridge, or call 911 in an emergency. How to report a bridge
Condition codes come straight from the FHWA National Bridge Inventory and are not a real-time safety judgment. Only the owning agency, a state DOT, county, or other owner, can post, restrict, or close a bridge.
Frequently Asked Questions
What do the condition ratings mean for US 301 SB?
US 301 SB in Prince George's, Maryland has a deck rating of 7/9, superstructure rating of 6/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is US 301 SB inspected?
US 301 SB's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval. It carries about 35,812 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. US 301 SB is currently shown as Fair condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for US 301 SB?
US 301 SB has an NBI inventory load rating of 35.8 metric tons.
Who is responsible for maintaining US 301 SB?
US 301 SB is owned and maintained by State Highway Agency.
How old is US 301 SB and does age affect safety?
US 301 SB was built in 1949, making it 77 years old and last reconstructed in 1986.
Disclaimer: Bridge condition data is from the FHWA NBI and reflects the last reported inspection. A Poor condition rating is not a live declaration that a bridge is closed or unsafe for travel. For current closure, posting, or safety information, contact the responsible transportation agency.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.