PERRING PKWY RAMP
Carrying PERRING PKWY RAMP over HERRING RUN
ON RAMP WB NORTHERN PKWY, Baltimore city, Maryland
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
PERRING PKWY RAMP in Baltimore city, Maryland sits above 69% of rated Maryland bridges on inventory load rating (55 t), while its 1965 build year is earlier than 54% of Baltimore city's recorded-year cohort (374 bridges).
PERRING PKWY RAMP in Baltimore city, Maryland is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1965, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 3. The lowest applicable rating sets the federal condition category, so this Poor result describes the weakest reported component rather than the structure as a whole. No NBI category is a closure decision or a live crossing-safety verdict.
NBI record plate
Structure MD:200000BC3203010
INTERSTATE-ERA · STEEL · MULTI-SPAN · SUPER-LED · HEAVY-ADT · HEAVY-LOAD · CAT-POOR
- INTERSTATE-ERA 1950–1979
- STEEL Steel
- MULTI-SPAN 3 spans
- SUPER-LED Superstructure-led
- HEAVY-ADT Heavy ADT
- HEAVY-LOAD Heavy load
- CAT-POOR Poor
Inspection-sheet codes from this record’s year, material family, spans, controlling component, ADT, inventory load, and NBI category, not a live closure verdict.
Bridge Snapshot: PERRING PKWY RAMP
The PERRING PKWY RAMP bridge in Baltimore city, Maryland carries PERRING PKWY RAMP over HERRING RUN. It was built in 1965, making it 61 years old today. The structure is built primarily of steel and spans 3 sections, stretching 61.9 meters (203 feet) end to end. Daily traffic averages 74,402 vehicles, placing it in the heavily-trafficked tier of Maryland bridges. It is owned and maintained by City/Municipal Highway Agency.
The latest FHWA inspection records show a deck rating of 4/9, superstructure at 3/9, substructure at 5/9. The weakest component sits in poor condition. At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules.
How PERRING PKWY RAMP compares
Age against the county: built in 1965, earlier than 203 of Baltimore city's 374 bridges with a recorded construction year (54%), against a county median build year of 1972. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Maryland bridges with a recorded inventory load rating (5,479 of 5,484 rated).
PERRING PKWY RAMP vs every rated Maryland bridge
Inventory load rating (metric tons), FHWA NBI, this state
55 Top 31% higher than 69% of 5,479 bridges
rated Maryland bridges, bucketed by value
Each bar is a band; taller bars hold more bridges. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source FHWA National Bridge Inventory · August 2026
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Reported 0–9 component ratings from the FHWA NBI. The highlighted component is the lowest reported input to this record’s current condition category; it is not a closure or live crossing-safety decision.
Baltimore city inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 374 bridges in this county. Orthogonal to this structure's component profile above: a county catalog share, not a live crossing-safety verdict.
Structural Details
- Year Built
- 1965
- Material
- Steel
- Number of Spans
- 3
- Structure Length
- 61.9 m (203 ft)
- Deck Width
- 8.7 m (29 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 74,402 vehicles/day
- Structure Number
- 200000BC3203010
Condition Analysis
- • The deck (driving surface) rates poor at 4/9, with advanced deterioration recorded on the latest inspection.
- • The superstructure (beams and supports above the deck) rates poor at 3/9, with advanced deterioration recorded on the latest inspection.
- • The substructure (piers and abutments) rates fair at 5/9, minor deterioration that routine maintenance should address.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
PERRING PKWY RAMP is in the federal Poor condition category. That is a component-based result, not a closure order.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Understand what Poor condition does and does not mean before drawing conclusions. Poor condition explained
- Compare PERRING PKWY RAMP against other structures in Baltimore city 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 PERRING PKWY RAMP?
PERRING PKWY RAMP in Baltimore city, Maryland has a deck rating of 4/9, superstructure rating of 3/9, and substructure rating of 5/9 on the FHWA's 0–9 scale.
How often is PERRING PKWY RAMP inspected?
PERRING PKWY RAMP'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 74,402 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. PERRING PKWY RAMP is currently shown as Poor condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for PERRING PKWY RAMP?
PERRING PKWY RAMP has an NBI inventory load rating of 55.3 metric tons.
Who is responsible for maintaining PERRING PKWY RAMP?
PERRING PKWY RAMP is owned and maintained by City/Municipal Highway Agency.
How old is PERRING PKWY RAMP and does age affect safety?
PERRING PKWY RAMP was built in 1965, making it 61 years old.
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.
Share this inspection record
Send this source-bounded record or download its data card. An NBI condition category is not a closure or live crossing-safety verdict.
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Component ratings, ADT, and condition category on this page are copied from the NBI record for this structure; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.