US Bridges

U.S. Route 101 NB over Smart Railroad Tracks

Good

Sonoma County, California · 04-SON-101-5.74-PET · Structure no. 20 0300R

Built
2022
3 years old
Condition
Good
inspected March 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
366 ft
3 main spans
Daily traffic
51,500
2019 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

U.S. Route 101 NB over Smart Railroad Tracks is a prestressed concrete continuous box beam or girders - multiple carrying U.S. Route 101 NB over Smart Railroad Tracks in Sonoma County, California. It was built in 2022, so it is 3 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 51,500 vehicles a day, roughly 6% of them trucks, projected to reach 67,000 by 2042. The structure is 366 ft (111.6 m) long and 59 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesU.S. Route 101 NB
CrossesSmart Railroad Tracks
Location04-SON-101-5.74-PET
RouteU.S. Route 101
Coordinates38.25472, -122.64286
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadGreater than HL 93
Structure length366 ft (111.6 m)
Longest span144 ft (43.9 m)
Deck width59 ft (18.1 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic51,500 (2019)
Projected traffic67,000 by 2042
Trucks6%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Park, Forest, or Reservation Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was U.S. Route 101 NB over Smart Railroad Tracks built?

It was built in 2022, making it 3 years old in 2025.

What condition is U.S. Route 101 NB over Smart Railroad Tracks in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2024.

How much traffic does U.S. Route 101 NB over Smart Railroad Tracks carry?

About 51,500 vehicles per day (2019 count), of which roughly 6% are trucks.

How long is U.S. Route 101 NB over Smart Railroad Tracks?

The structure is 366 ft (111.6 m) long with a longest span of 144 ft (43.9 m) and a deck 59 ft wide.

Who owns U.S. Route 101 NB over Smart Railroad Tracks?

It is owned by the State Park, Forest, or Reservation Agency and maintained by the State Highway Agency.