US 101 W&E BAYSHR
US 101 W&E BAYSHR in 04-Sm-101-0.01-Pa, San Mateo County, California received a condition grade of B (78/100). Built in 2018, the bridge carries 226K vehicles daily on US 101 W&E BAYSHR over San Francisquito Creek.
US 101 W&E BAYSHR carries a B on the BridgeSafety Condition Score with 78/100. 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 2018 and is 8 years old — relatively young against the U.S. bridge stock. Modern bridges built to current FHWA standards generally outperform older structures on condition ratings. US 101 W&E BAYSHR carries an average daily traffic count of 225,800 vehicles, with 14 lane(s) crossing San Francisquito Creek. 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
US 101 W&E BAYSHR is a 8-year-old bridge located 04-Sm-101-0.01-Pa in San Mateo County, California. The bridge carries US 101 W&E BAYSHR over San Francisquito Creek with 14 traffic lanes, handling approximately 226K vehicles per day. Built in 2018, the structure spans 38.1 meters.
The bridge received a Condition Grade of B (78/100) 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
US 101 W&E BAYSHR has a Condition Score of 78/100 (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.
US 101 W&E BAYSHR was built in 2018, making it 8 years old. The average bridge age in the United States is 48 years.
US 101 W&E BAYSHR carries approximately 226K vehicles per day (average daily traffic). The bridge has 14 traffic lanes. It is 38.1 meters long and located on US 101 W&E BAYSHR in 04-Sm-101-0.01-Pa, San Mateo County, California.
No, US 101 W&E BAYSHR is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
US 101 W&E BAYSHR is located 04-Sm-101-0.01-Pa in San Mateo County, California. The bridge carries US 101 W&E BAYSHR over San Francisquito Creek. Its coordinates are 37.452989, -122.127461. It is maintained by State Highway Agency.
US 101 W&E BAYSHR carries US 101 W&E BAYSHR over San Francisquito Creek. The bridge is 38.1 meters long and was built in 2018.
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.