I 495 NB over RR Mbta/csx

Norfolk County, Massachusetts · rated Poor in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

• I 495 NB over RR Mbta/csx in Norfolk County, Massachusetts, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
• Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
• It was built in 1966, making it 59 years old at the 2025 inventory.
• It carries about 40,744 vehicles a day (traffic count year 2021).
• Its listed owner is the state highway agency.
• It is one of 21 of the 343 inventoried bridges in Norfolk County rated poor (6.1%); 21 (6.1%) are rated poor.
• A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

View this bridge on a map → (42.08744, -71.42478)

Component ratings

Bridge details

Source: FHWA National Bridge Inventory, 2025 data as reported by the Massachusetts department of transportation.

Busiest bridges in Norfolk County

All bridges nearby: Norfolk County, MA bridge conditions · every bridge in Norfolk County · Massachusetts bridges.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.