By Collision Hour
The Collision Hour varies by alcohol use, size of county and whether it occurs on number state highways or unincorporated* areas of counties.
*Traffic Death Data from the California Highway Patrol reports location in a number of different way. Here data is examined by
1.
Type
of
Highway: State and Federal highways (numbered highway, e.g.
I5,) or other kind of roads (county highways, rural roads and city
streets.)
2. Incorporated and Unincorporated
Areas: All cities are incorporated and can be considered 'urban'
all other areas are unincorporated and can be considered 'rural'.
| 1991-2008! Trend Data |
 |
+
Most non-alcohol Collisions occur in the afternoon. |
