ROUTE 101 SB
ROUTE 101 SB in 07-La-101-S1.28-La, Los Angeles County, California received a condition grade of B (63/100). Built in 1947, the bridge carries 140K vehicles daily on ROUTE 101 SB over Mission RD-E10 On-Ramp.
ROUTE 101 SB carries a B on the BridgeSafety Condition Score with 63/100. 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 1947 and is now 79 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. ROUTE 101 SB carries an average daily traffic count of 140,000 vehicles, with 2 lane(s) crossing Mission RD-E10 On-Ramp. 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
ROUTE 101 SB is a 79-year-old bridge located 07-La-101-S1.28-La in Los Angeles County, California. The bridge carries ROUTE 101 SB over Mission RD-E10 On-Ramp with 2 traffic lanes, handling approximately 140K vehicles per day. Built in 1947, the structure spans 52.1 meters.
The bridge received a Condition Grade of B (63/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 7/9 (good), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
ROUTE 101 SB has a Condition Score of 63/100 (Grade B). Its deck is rated 7/9, superstructure 7/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
ROUTE 101 SB was built in 1947, making it 79 years old. The average bridge age in the United States is 48 years.
ROUTE 101 SB carries approximately 140K vehicles per day (average daily traffic). The bridge has 2 traffic lanes. It is 52.1 meters long and located on ROUTE 101 SB in 07-La-101-S1.28-La, Los Angeles County, California.
No, ROUTE 101 SB is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
ROUTE 101 SB is located 07-La-101-S1.28-La in Los Angeles County, California. The bridge carries ROUTE 101 SB over Mission RD-E10 On-Ramp. Its coordinates are 34.051922, -118.224239. It is maintained by State Highway Agency.
ROUTE 101 SB carries ROUTE 101 SB over Mission RD-E10 On-Ramp. The bridge is 52.1 meters long and was built in 1947.
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.