I-280 Southbound over Alpine RD & Los Trancos

Fair Condition57 years old46,500 vehicles/day

Location

StateCalifornia
CountySan Mateo
Location04-sm-280-r0.01
CarriesI-280 Southbound
CrossesAlpine RD & Los Trancos
Coordinates37.40883, -122.19386

Condition Ratings

Overall ConditionFair
Deck7 (Good)
Superstructure5 (Fair)
Substructure7 (Good)
Channel/Waterway8 (Very Good)
Scour Critical5 — Stable for scour

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length365.2 ft (111.3 m)
Max Span91.9 ft (28 m)
Deck Width79.7 ft (24.3 m)
Deck Area2704.6 sq m
Main Spans4
Year Built1969

Traffic

Avg Daily Traffic46,500 (2009)
Lanes On Bridge5
Lanes Under Bridge5

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure Number35 0009L

Nearby Bridges

I-280 Northbound over Alpine RD & Los Trancos 0.0 mi Poor I-280 SB Onramp over Los Trancos Creek 0.0 mi Good I-280 NB Offramp over Los Trancos Creek 0.1 mi Fair Alpine RD over San Francisquito Creek 0.3 mi Fair Interstate 280 NB over San Francisquito Creek 0.3 mi Poor Interstate 280 SB over San Francisquito Creek 0.3 mi Poor Interstate 280 over Stanford Linear Accel 1.0 mi Fair Junipero Serra Bld over San Francisquito Creek 1.1 mi Fair Sand Hill RD over San Francisquito Creek 1.4 mi Fair Sand Hill Road (s) over Interstate 280 1.6 mi Fair