What is one way sobriety checkpoints help prevent drunk driving?

Sobriety checkpoints act as a significant deterrent to drunk driving primarily because the presence of law enforcement visibly signals to drivers that they are being monitored. This heightened visibility encourages individuals to think twice before driving under the influence, as they are aware that the likelihood of being stopped and tested for sobriety is increased. The potential for legal consequences or embarrassment associated with being caught can prompt people to make safer choices, such as finding an alternative mode of transportation if they have been drinking. This proactive approach helps to reduce the incidence of drunk driving in areas where checkpoints are established.

The other options do not capture the preventative nature of sobriety checkpoints effectively. For instance, they do not guarantee that all drivers will be alcohol-free, nor do they automatically lead to immediate legal penalties, such as jail time or license revocation, without due process following the detection of impaired driving.