STATE ROUTE 170
STATE ROUTE 170 in 07-La-170-R19.72-La, Los Angeles County, California received a condition grade of B (70/100). Built in 1968, the bridge carries 175K vehicles daily on STATE ROUTE 170 over Roscoe BLVD.
STATE ROUTE 170 carries a B on the BridgeSafety Condition Score with 70/100. 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 1968 and is now 58 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. STATE ROUTE 170 carries an average daily traffic count of 175,000 vehicles, with 11 lane(s) crossing Roscoe BLVD. 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
STATE ROUTE 170 is a 58-year-old bridge located 07-La-170-R19.72-La in Los Angeles County, California. The bridge carries STATE ROUTE 170 over Roscoe BLVD with 11 traffic lanes, handling approximately 175K vehicles per day. Built in 1968 and reconstructed in 2006, the structure spans 48.2 meters.
The bridge received a Condition Grade of B (70/100) based on Federal Highway Administration inspection data. Its deck is rated 6/9 (fair), superstructure 7/9 (good), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
STATE ROUTE 170 has a Condition Score of 70/100 (Grade B). Its deck is rated 6/9, superstructure 7/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
STATE ROUTE 170 was built in 1968 and reconstructed in 2006, making it 58 years old. The average bridge age in the United States is 48 years.
STATE ROUTE 170 carries approximately 175K vehicles per day (average daily traffic). The bridge has 11 traffic lanes. It is 48.2 meters long and located on STATE ROUTE 170 in 07-La-170-R19.72-La, Los Angeles County, California.
No, STATE ROUTE 170 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
STATE ROUTE 170 is located 07-La-170-R19.72-La in Los Angeles County, California. The bridge carries STATE ROUTE 170 over Roscoe BLVD. Its coordinates are 34.221453, -118.409772. It is maintained by State Highway Agency.
STATE ROUTE 170 carries STATE ROUTE 170 over Roscoe BLVD. The bridge is 48.2 meters long and was built in 1968, with reconstruction in 2006.
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.