Federal, state and local jurisdictions may require full documentation of any deviation from the predetermined plan. Site Selection Identify locations with a high incidence of impaired driving related crashes or fatalities. When selecting a site for a sobriety checkpoint, the safety of the general public is the top priority. Conduct the checkpoint with the least amount of inconvenience and intrusion to the motorist. Consider the safety of your officers and volunteers when selecting a site.
Visibility is an important factor.
Take into account the traffic volume, single-vehicle collision history and impaired driving arrest history of a particular stretch of road before choosing it as a site. Choose several stretches of roadway as potential locations for sobriety checkpoints. A sobriety checkpoint's effect on traffic flow should be measured before committing to a location. To determine a roadway's potential traffic build-up, estimate the time necessary to conduct a single motorist interview. Multiply the time by the number of available officers and divide by the average number of vehicles that can be expected at that location during the checkpoint.