MARYLAND RT.458-SI
Carrying MARYLAND RT.458-SI over SUITLAND PARKWAY
1.8 MILES FROM SUITLAND R, Prince George's, Maryland
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: MARYLAND RT.458-SI
The MARYLAND RT.458-SI bridge in Prince George's, Maryland carries MARYLAND RT.458-SI over SUITLAND PARKWAY. It was built in 1943, making it 83 years old today. It was last reconstructed in 1965, extending its service life. The structure is built primarily of concrete continuous and spans 2 sections, stretching 30.9 meters (101 feet) end to end. Daily traffic averages 42,725 vehicles, placing it in the heavily-trafficked tier of Maryland bridges. It is owned and maintained by National Park Service.
The latest FHWA inspection records show a deck rating of 6/9, superstructure at 6/9, substructure at 6/9. The weakest component sits in fair condition. All reported major components score above the Poor range. Its NBI inventory load rating is 23.6 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How MARYLAND RT.458-SI 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 How the historical reference is calculated.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
- 1943
- Last Reconstructed
- 1965
- Material
- Concrete Continuous
- Number of Spans
- 2
- Structure Length
- 30.9 m (101 ft)
- Deck Width
- 30.5 m (100 ft)
- Owner
- National Park Service
- Avg Daily Traffic
- 42,725 vehicles/day
- Structure Number
- 3564005P0000000
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
- • At 6/9, the superstructure (beams and supports above the deck) shows fair condition, with minor wear flagged for upkeep.
- • At 6/9, the substructure (piers and abutments) shows fair condition, with minor wear flagged for upkeep.
How to read this record
This page shows what the last federal inspection recorded, not whether MARYLAND RT.458-SI 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 MARYLAND RT.458-SI 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 MARYLAND RT.458-SI?
MARYLAND RT.458-SI in Prince George's, Maryland has a deck rating of 6/9, superstructure rating of 6/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is MARYLAND RT.458-SI inspected?
MARYLAND RT.458-SI'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 42,725 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. MARYLAND RT.458-SI 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 MARYLAND RT.458-SI?
MARYLAND RT.458-SI has an NBI inventory load rating of 23.6 metric tons.
Who is responsible for maintaining MARYLAND RT.458-SI?
MARYLAND RT.458-SI is owned and maintained by National Park Service.
How old is MARYLAND RT.458-SI and does age affect safety?
MARYLAND RT.458-SI was built in 1943, making it 83 years old and last reconstructed in 1965.
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.