Bike crashes on US-101, San Francisco

We don't rate streets as safe or unsafe: crash counts can't say how risky a street is, and busy streets have more crashes partly because more people use them. This page covers traffic crashes, not crime. These counts are too low: only 2% of San Francisco's reported bike crashes have a map location. What the records show: 22 bike crashes were reported on US-101 in San Francisco from 2021–2025, 5 of them serious or fatal (1 fatal). The most were at US-101 & Alexander Ave U (7).

• 36% were sideswipes (close passes, right hooks, car doors).
• 9% happened after dark.

1. US-101 & Alexander Ave U

   7 crashes · 2 serious or fatal

   Falls and fixed objects

   4 of 7 crashes were a fall or hitting an object, with no other vehicle involved. Traffic is posted at about 45 mph.

   • Watch the surface here: potholes, drain grates, rail tracks and gravel. Cross tracks at a right angle.
   • Traffic is fast here. A quieter parallel street is often worth the extra minutes.
   See it on the map

2. US-101 & Conzelman Rd

   4 crashes · 1 serious or fatal

   Close passes and cars turning alongside

   3 of 4 crashes were sideswipes: a vehicle alongside, typically a close pass, a right hook, or an opening car door.

   • Ride at least 4 feet from parked cars to stay out of the door zone, and watch for drivers who overtake and then turn right across you.
   See it on the map

3. US-101 & Ggb South Tower

   3 crashes

   Close passes and cars turning alongside

   2 of 3 crashes were sideswipes: a vehicle alongside, typically a close pass, a right hook, or an opening car door.

   • Ride at least 4 feet from parked cars to stay out of the door zone, and watch for drivers who overtake and then turn right across you.
   See it on the map

Spots with 3 or more reported crashes within about 250 m, worst first.

The busiest hour was 1 p.m..

Where on US-101 do the most bike crashes happen?

US-101 & Alexander Ave U, with 7 reported bike crashes from 2021–2025, 2 of them serious or fatal. Next are US-101 & Conzelman Rd (4) and US-101 & Ggb South Tower (3).

How do cyclists usually get hit on US-101?

36% were sideswipes (close passes, right hooks, car doors). 9% happened after dark.

How many bike crashes happen on US-101 each year?

Reported bike crashes on US-101 in San Francisco: 2021: 2, 2022: 2, 2023: 5, 2024: 5, 2025: 8. The latest year can rise as late reports come in.

Where does this data come from?

Police crash reports in the California Crash Reporting System (CCRS), published by the state on data.ca.gov, counted by the street each report names first. Only crashes reported with map coordinates are counted, so the real totals are higher.