Most Dangerous Roads in California

#	Road	Crashes	Fatalities	Fatal / 1k
1	US-101	28,335	76	2.7
2	I-5	25,821	73	2.8
3	I-10	18,002	19	1.1
4	I-80	14,084	37	2.6
5	I-405	12,788	3	0.2
6	I-15	12,216	35	2.9
7	SR-99	11,490	38	3.3
8	SR-60	9,057	12	1.3
9	I-880	7,784	24	3.1
10	SR-91	7,674	0	0.0
11	I-210	6,387	9	1.4
12	I-110	5,591	2	0.4
13	I-215	5,404	2	0.4
14	I-580	4,506	27	6.0
15	I-280	4,477	22	4.9
16	US-50	4,242	21	5.0
17	SR-1	4,075	51	12.5
18	MAIN ST	3,839	28	7.3
19	I-605	3,826	2	0.5
20	I-680	3,693	14	3.8
21	US-101 N	3,203	0	0.0
22	SR-210	3,194	4	1.3
23	I-710	3,174	0	0.0
24	US-101 SOUTHBOUND	3,171	37	11.7
25	SR-14	3,131	6	1.9

California's most dangerous roads by crash volume are concentrated in the Southern California megalopolis. Interstate 5, Interstate 405, and Interstate 10 carry the highest absolute crash counts because they are among the busiest freeways in the United States — often exceeding 350,000 vehicles per day in their most congested segments. Caltrans Traffic Volumes High traffic density produces frequent rear-end collisions, side-swipes, and merge-zone crashes even at relatively modest speeds.

Roads that rank high on fatality rate — fatal crashes per 1,000 total crashes — tend to be different corridors entirely. State Route 99 through the Central Valley, US Highway 101 through coastal and inland segments, and rural two-lane state routes operate at highway speeds but lack the median barriers, lighting, and emergency response infrastructure of urban freeways. A single errant crossing-of-center on SR-46 or SR-33 is far more likely to be fatal than a rear-end collision at 15 mph on the 405.

Speed is the primary collision factor in nearly all fatal crashes statewide. The California Highway Patrol reports that speed-related crashes account for roughly 35–40% of all traffic fatalities each year. CHP Annual Report Impairment and distracted driving are the next most common factors, followed by failure to yield right-of-way. Pedestrian fatalities are heavily concentrated on arterial streets, not freeways — surface streets with mixed traffic, frequent crossings, and variable speeds produce disproportionate pedestrian deaths relative to their total crash counts.

The rankings on this page cover crashes recorded by the California Highway Patrol or submitted by local law enforcement to the California Crash Records System (CCRS) since January 2024. Only investigated, completed crash reports are included. Minor property-damage crashes not reported to law enforcement are excluded, which slightly underrepresents crash totals on lightly patrolled rural roads.