IS 495
IS 495 in 0.28 MI W Of Pg Co, Montgomery County, Maryland received a condition grade of B (64/100). Built in 1963, the bridge carries 243K vehicles daily on IS 495 over Md 650.
IS 495 carries a B on the BridgeSafety Condition Score with 64/100. Most component ratings are solid; one or two may show wear consistent with the structure’s age, but the bridge is not flagged as structurally deficient.
The bridge was built in 1963 and is now 63 years old, at or past the typical 50-year design life for bridges of its vintage. Maintenance and inspection cycles are correspondingly more involved than for newer structures. IS 495 carries an average daily traffic count of 242,500 vehicles, with 12 lane(s) crossing Md 650. The owning agency is State Highway Agency; bridge inspection records flow into the federal NBI database annually.
Component Ratings
The riding surface, evaluated for cracking, spalling, and wear
Beams, girders, and trusses that support the deck
Piers, abutments, and foundations below the deck
Bridge Details
About This Bridge
IS 495 is a 63-year-old bridge located 0.28 MI W Of Pg Co in Montgomery County, Maryland. The bridge carries IS 495 over Md 650 with 12 traffic lanes, handling approximately 243K vehicles per day. Built in 1963 and reconstructed in 1993, the structure spans 61.3 meters.
The bridge received a Condition Grade of B (64/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 6/9 (fair), and substructure 6/9 (fair).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
IS 495 has a Condition Score of 64/100 (Grade B). Its deck is rated 7/9, superstructure 6/9, and substructure 6/9 on the NBI scale. The bridge is not classified as structurally deficient.
IS 495 was built in 1963 and reconstructed in 1993, making it 63 years old. The average bridge age in the United States is 48 years.
IS 495 carries approximately 243K vehicles per day (average daily traffic). The bridge has 12 traffic lanes. It is 61.3 meters long and located on IS 495 in 0.28 MI W Of Pg Co, Montgomery County, Maryland.
No, IS 495 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
IS 495 is located 0.28 MI W Of Pg Co in Montgomery County, Maryland. The bridge carries IS 495 over Md 650. Its coordinates are 39.019108, -76.977003. It is maintained by State Highway Agency.
IS 495 carries IS 495 over Md 650. The bridge is 61.3 meters long and was built in 1963, with reconstruction in 1993.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.
Source: FHWA National Bridge Inventory, 2026.