States › Arizona › Routes › State Route 303
State Route 303
Fatal crashes 2015–2024 30Deaths 34Counties 1Latest data year 2024
FARS data are based on police crash reports and other sources; the drunk-driving measure is based on the highest BAC of any driver in the crash. Latest data year: 2024. The route is the trafficway recorded for each crash (FARS TWAY_ID); the same route number in another state has its own page.
Between 2015 and 2024, FARS records 30 fatal crashes on State Route 303 in Arizona, with 34 deaths.
That is 0.3% of the 9,968 fatal crashes in Arizona over the same years. The ten-year crash count rose 36% from 22 in 2005–2014 to 30 in 2015–2024.
The crashes were concentrated in Maricopa County (30).
40.0% of the crashes had a driver reported as drinking (Arizona: 21.8%) and 53.3% had a speeding-related driver (32.7%); pedestrians were 2.9% and motorcyclists 17.6% of those killed.
Fatal crashes per year
Route identification in FARS is consistent from 2000; earlier years are not shown. Shaded band: the ten-year window used for the shares below.
Compared with all fatal crashes in Arizona
| Measure | State Route 303 | Arizona |
|---|---|---|
| Fatal crashes, 2015–2024 | 30 | 9,968 |
| Deaths, 2015–2024 | 34 | 10,939 |
| Deaths per fatal crash | 1.1 | 1.1 |
| Share of state fatal crashes | 0.3% | 100% |
| Change vs previous ten years | +36% | +20% |
Factor shares
Counties along the route
| # | County | Fatal crashes on SR-303 | Share of route | County total, all roads |
|---|---|---|---|---|
| 1 | Maricopa County | 30 | 100% | 5,007 |
Hour of day
Share of fatal crashes on State Route 303 beginning in each hour, 2015–2024; tick marks the Arizona share for all roads.
Where along the route
| Mile marker range | Fatal crashes | Share |
|---|---|---|
| Mile 0–5 | 10 | 33% |
| Mile 5–10 | 5 | 17% |
| Mile 10–15 | 2 | 7% |
| Mile 20–25 | 2 | 7% |
| Mile 25–30 | 2 | 7% |
| Mile 30–35 | 2 | 7% |
Five-mile bins by FARS milepoint, the six with the most fatal crashes; 90% of crashes on the route have a milepoint. Milepoints are as recorded by the state and can restart at county or district lines.
Other routes in Arizona
- Interstate 10 562
- US Route 60 303
- Interstate 40 253
- Interstate 17 238
- State Route 87 179
- State Route 101 176
- US Route 93 128
- State Route 202 123
- State Route 95 114
- State Route 260 101
- US Route 191 85
- Interstate 8 79
All routes and counties in Arizona
Questions and answers
How many fatal crashes have there been on State Route 303 in Arizona?
30 fatal crashes with 34 deaths over 2015–2024, per NHTSA's FARS. The route is the trafficway recorded for the crash; the same numbered route in another state has its own page.
Which counties along State Route 303 had the most fatal crashes?
Maricopa County (30).
What share of crashes on State Route 303 involved alcohol or speeding?
40.0% had a driver reported as drinking and 53.3% a speeding-related driver, against 21.8% and 32.7% for all fatal crashes in Arizona.
When do fatal crashes happen on State Route 303?
53.3% of the crashes were between 6pm and 6am. The hour chart on this page shows the full distribution.
Provenance
Source: NHTSA Fatality Analysis Reporting System, annual national CSV files 2000–2024 (accident, vehicle and person tables), public domain. Route pages are built for signed Interstate, US and state routes with at least 20 fatal crashes in 2015–2024. Data through 31 Dec 2024; generated 30 Sep 2026. See methodology and corrections.