Drunk Driving Penalties

Many jurisdictions require more serious penalties (such as jail time, larger fines, longer DUI programs, the installation of ignition interlock devices) in cases where the driver's BAC is over 0.20%, or 0.15% in some places. These additional sanctions are an attempt to deter and punish the operation of a vehicle at extremely high BAC levels and the concomitant danger posed to the safety of persons and property by heavily impaired drivers. As of July 1, 2010, California implemented a pilot project for DUI sentencing. In two counties, Los Angeles and Alameda, first offenders convicted of drunk driving are required to install an ignition interlock device in their car for a period of five months. Previously, this requirement was only mandated for second offenders and then for a three year period. California DMV has now written guidelines to clear up any ambiguities in the law.

Compared to many other countries, penalties for drunk driving in the United States are light, unless alcohol is involved in an incident causing injury or death of others, in which case they are very heavy compared to other nations. See Driving under the influence. Some states, such as Wisconsin, do not permanently revoke driving permits even if the offender is convicted multiple times.