From: Optimizing sobriety checkpoints to maximize public health benefits and minimize operational costs
Checkpoint | 1 | 2a | 2b | 3a | 3b | 4 |
---|---|---|---|---|---|---|
Checkpoint type | Control | Intervention | Intervention | Intervention | Intervention | Control |
Total vehicles | n/a | 235 | 294 | 290 | 232 | n/a |
Total vehicles stopped | n/a | 235 | 294 | 284 | 232 | n/a |
Police operations | Â | Â | Â | Â | Â | Â |
 Conducted at planned location | Yes | Yes | Yes | Yes | Yes | No |
 Conducted at planned hours | Yes | Yes | Yes | Yes | Yes | No |
 Officers present | 14 | 8 | 8 | 8 | 8 | 0 |
 Total payroll costs | $701.06 | $547.43 | $524.29 | $557.08 | $495.51 | n/a |
Research operations | Â | Â | Â | Â | Â | Â |
 Conducted field data collection | No | Yes | Yes | Yes | Yes | No |
 Research assistants present | 0 | 4 | 4 | 5 | 5 | 0 |
DWI outcomes | Â | Â | Â | Â | Â | Â |
 DWI investigation | 2 | 1 | 6 | 4 | 1 | – |
 DWI arrests | 0 | 1 | 0 | 0 | 0 | – |
 DWI convictions | 0 | 0 | 0 | 0 | 0 | – |
 Open container | 1 | 1 | 0 | 0 | 0 | – |
 DWI over 21 | 0 | 1 | 0 | 0 | 0 | – |
Other outcomes | Â | Â | Â | Â | Â | Â |
 No operator’s license | 4 | 15 | 11 | 7 | 7 | – |
 DWLR violations | 8 | 3 | 4 | 1 | 4 | – |
 Registration violations | 3 | 1 | 2 | 3 | 1 | – |
 Other violations | 19 | 4 | 3 | 3 | 2 | – |
 Warnings | 3 | 1 | 1 | 5 | 0 | – |
 Drug violations | 0 | 0 | 1 | 1 | 0 | – |
 Wanted persons | 0 | 0 | 0 | 0 | 0 | – |
 Total | 37 | 24 | 22 | 20 | 14 | – |