San Mateo County Traffic and Road Conditions

San Mateo County Traffic Map

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No Traffic Flow? Choose Live Map then Zoom in Closer

San Mateo County traffic flow and incidents map - how to use it to check live traffic, road conditions, and weather impacts:
A static map with traffic flow is shown first and to start using the interactive map you press the blue Load button above to go live.

Traffic flow lines: Red/White dashed lines = Closed Road, Grey/White dashed lines = Road Work, Red lines = Heavy traffic flow, Yellow/Orange lines = Medium flow, and Green = normal traffic. Black lines or no traffic flow lines could indicate a closed road, but in most cases it means that either there is not enough vehicle flow to register or traffic isn't monitored. Also, if you do not see traffic flow, you can zoom in closer to reveal localized data. If you are unable to pan the map, press here (to focus off of the map) and try again.

Traffic Incidents: Each icon represents a traffic event or incident such as road construction, closure (red circle with a white dash), or accident. In some regions there may also be live traffic camaras to view.

In known extreme weather events or accidents, the map may still show green lines, even if lanes or the entire road are closed.

San Mateo County Traffic Alerts

Construction 10.6 mi

Construction assistance on US 101 South

Traffic assistance is ongoing for construction activities on southbound US 101 just south of SR 92. Expect possible delays as crews work.

Us101 S / Sr92 W Us101 S Con Updated 12:38 AM
Collision 12.2 mi

Crash on US 101 North at Shoreline Blvd

A gray Lexus SUV collided with an unknown vehicle, blocking lanes one and two. Lanes three and four remain open, and tow services are en route.

Us101 N / Shoreline Blvd Ofr Updated 12:39 AM
Hazard 18.3 mi

Hazard reported on I-880 South

There's a vehicle on I-880 South near Alvarado Blvd with something dragging underneath, causing sparks. Units are en route to address the situation.

I880 S / Alvarado Blvd Ofr Updated 12:31 AM
Collision 21.1 mi

Collision involving two SUVs on I680 N

A black Mazda SUV is on the right shoulder while a black Chevy SUV is blocking lane one on northbound I-680 near the SR-262 connector. Four children were reported in the Mazda.

I680 N / Sr262 I680 N Con Updated 12:58 AM
Collision 23.7 mi

Collision on SR84 near Fremont

A solo vehicle collision occurred on EB SR84 about 2 miles east of Fremont after swerving to avoid an animal. All vehicles are currently on the right shoulder.

4870 - 4899 Sr84 Updated 1:05 AM
Collision 25.8 mi

Collision on US 101 North near Vermont St

Northbound US 101 just south of Vermont Street has a white Honda Civic and a silver Toyota sedan involved in a collision. No lanes are blocked, and a tow is on the way.

Us101 N / Vermont St Ofr Updated 12:37 AM
Construction 28.7 mi

Construction Assistance on I580 W

Construction work is ongoing on I580 West at Lake Park Ave Onr, with units assisting at the scene. No major delays reported.

I580 W / Lake Park Ave Onr Updated 12:45 AM


California State Official Traffic Resources:
CA DOT | Caltrans QuickMap | CHP Traffic Full Site | CHP Traffic Mobile Site
sources: Caltrans, CHP, Twitter
Alerts Last Updated: Tue, Aug 18th 12:11:20 AM

National Traffic Forecast

 

Currently

Overcast 56°F
30.03 inHg.
Barometer
89%
Humidity
SW 5.4 mph
Wind
Overcast

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