I think the lack of decent public transport in many places contribute to this. When I've lived in cities with good public transport I would usually take the bus, especially if I wasn't feeling in a good mental state to drive (tired, stressed, other). In Orlando that's not an option, here I can chose to stay home or drive.
That is a very valid point. Even the best city I've lived in as far as public transit goes had issues such as stopping service around midnight, even on weekends. If the goal was to reduce drinking driving and/or driving tired you'd think they'd keep those going, but instead they just bring out the DUI checkpoints.
Where I grew up the last bus would leave downtown around 4am and the trams stopped for an hour between 6-7am on Sat-Sun (after basically all the bars and clubs had closed). That aspect was pretty good. Most other aspects of Swedish drinking culture is not great...
