Collision
7.4 mi
Collision on SR-92 East near Hillsdale
Eastbound SR-92 at Hillsdale Blvd has a Chevy Trailblazer that crashed into a hillside, with airbags deployed. A tow is requested for the vehicle.
Half Moon Bay Traffic and Road Conditions
Half Moon Bay Traffic Map
Want to See More Local Traffic Detail? Choose live Map, toggle Flow or Alerts, then zoom in closer to find road conditions, traffic flow, and incidents.
Tips
- Click or touch the map to move in different directions.
- If you do not see any markers on the map, try zooming in one or two levels using "+" on the top left side. However, they are not always available.
- Click an incident icon on the map to get more information.
FAQs
Q) How often is the map updated?
A) The traffic flow is updated at loadtime and upon movement outside the initial map view, or upon refresh of the page. Any incident markers are checked for updates approximately every 5-10 minutes, but you need to reload the page to load any new updates; the data provided may still be the same status/view as before. Information shown is as only reliable as how it is reported to us.
Q) The roads are backed up or closed, but the map does not show the reason why, what's up with that?A) Municipal traffic monitors or GPS trackers may not be available, could be offline, or reports and alerts are not syndicated to media outside of the area to use on the map. This is especially true for rural areas. You are encouraged to leave a road conditions report to help others.
Q) I see traffic alerts in the box below for the state, but they aren't related to the area I'm in? A) We attempt to display alerts as specific to the area as possible, however in some cases the data we receive will only allow us to provide it by county or even statewide.
Q) Are you an official source of traffic information? A) We are not an official source of traffic or real-time data. We have contracts and licenses to display certain up-to-date information that comes direct from some DOTs in various states, and the traffic flow on the maps is provided by TomTom or other map platforms. However, the data shown here should only be used for light informational and reference purposes and not to make critical decisions. Your safest option on the web is to use your official state-run traffic website, or to call the DOT traffic line for your state, local authorities, or the state's 511 number if available.
Half Moon Bay Traffic Alerts
Collision
9.9 mi
Collision on Shelter Creek Ln
A vehicle hit a guardrail on Shelter Creek Lane, causing possible damage. No injuries reported. Police are on the scene.
Closure
31.4 mi
Construction closure on SB 101 to SR1
The southbound 101 ramp to State Route 1 is closed until 1 AM for emergency repairs. Expect delays in the Marin area as crews work on the site.
Construction
31.7 mi
Construction lane closures on SR17
On SR17 northbound, the second lane is closed near Bear Creek Road due to ongoing construction. Expect delays as work continues.
Hazard
34.0 mi
Vehicle off-road on SR-17 South near Summit
SR-17 South is blocked near Summit due to a vehicle that went off the roadway and down an embankment. A heavy-duty tow is required for the Chevrolet Silverado, which is reportedly in two pieces.
Fire
35.9 mi
Car fire reported on Manor Rd
Smoke and flames have been seen from a car fire next to a residence on Manor Road. Fire crews are responding to the scene.
Floriston Fire grows to more than 600 acres, westbound I-80 remains closed | California News | 2news.com
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Floriston Fire Burns 613 Acres Near I-80 in Nevada County, Prompting Evacuations and Highway Closures
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Night-flying helicopters help battle Floriston Fire; fire more than 600 acres; westbound I-80 still closed | California News | 2news.com
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Fast-Moving Wildfire Near Truckee Closes Span of I-80 | KQED
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UPDATE: Full Weekend Closures on Northbound U.S. 101 & Lane Reduction on Southbound (Hospital Curve) September 18-21
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Sacramento Highway 50 crash closes several westbound lanes near 16th Street - CBS Sacramento
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Westbound lanes of Interstate 80 shut down due to Floriston Fire | Covering California | actionnewsnow.com
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Monsoonal Weather Prompts Emergency Project On Highway 243 Near Banning: Caltrans | Banning, CA Patch
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Travel - Caltrans - CA.gov
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Traffic Alerts - Los Angeles
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California State Official Traffic Resources:
CA DOT | Caltrans QuickMap | CHP Traffic Full Site | CHP Traffic Mobile Site
CA DOT | Caltrans QuickMap | CHP Traffic Full Site | CHP Traffic Mobile Site
sources: Caltrans, CHP, Twitter
Alerts Last Updated: Fri, Sep 18th 12:54:27 AM
Are You Here in Half Moon Bay?
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National Traffic Forecast
Flash Flooding and Record Highs Impacting Roads and Travel for 09-17 to 09-19
Updated Thu Sep 17th 2026, 5:07am PDT
Southwest & Great Basin Area
Drivers in the Southwest should be on high alert for sudden heavy rain and potential flash flooding especially along the I-40 and I-10 corridors. Keep an eye out for ponding water which can lead to unexpected road closures.Southern Rockies
Commuters traveling through the Southern Rockies, including highways like I-25, should prepare for showers and possible thunderstorms. The risk of flash flooding is present, so please drive carefully and be mindful of road closures.Northern Plains & Upper Midwest
As we head into Friday and Saturday, heavy rain is expected to develop along the I-94 and I-90 corridors. Be prepared for potential flash flooding, which could lead to traffic delays and detours.Central Plains & Midwest
The cooler air makes its way into the area, but watch out for cooler temperatures that could impact tire pressure. Routes like the I-70 and I-80 should see less severe weather impacts.Southern Plains & Mississippi Valley
Travelers in this region should prepare for intense heat, especially in areas along I-35, I-20, and I-55. Ensure your vehicle's air conditioning is working well and stay hydrated.Florida
Scattered thunderstorms are expected primarily on State Route 528 and US-1. While heavy rain is less likely, be aware of slippery roads and drive with caution.
This live traffic and road conditions report is valid for ZIP code 94019, accurately covering the area of Half Moon Bay, CA.
Currently
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59°F |
30.1 inHg.
Barometer 90%
Humidity NW 9.4 mph Wind |
| Clear | ||
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National Outlook
More Flash Flooding Expected in the Southwest and Plains: 09-17 to 09-19
Thu Sep 17th 2026, 5:06am PDT
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