Ralph's column led me to do a search on
Sweden "drunk driving" prisongiving over 60,000 references. An answer.com item led me to Vägverket's site (Swedish Highway Administration) and I did a further search to find a relevant document in English. If you want to read it, go to
http://publikationswebbutik.vv.se/shopping/ShowItem____3944.aspx
and click on "Ladda när document". This will download "National cooperation against drink and drug driving in traffic according to the Skellefte model" into your computer. The Skellefteå model is a very comprehensive program to combat a very serious problem.
BTW, if you read Swedish, you can also find some documents that relate some really sad stories about the consequences of drunk driving.