Minnesota Department of Transportation officials are advising motorists to slow down when approaching highway paint-striping crews. The work is being done on various state highways in south-central Minnesota beginning today (THU), and is expected to take about 3 weeks to complete. Paint striping operations move at around 10 miles-per-hour, and a truck with warning lights follows the paint-striping truck to alert motorists approaching from behind. Motorists should give workers plenty of room and pass with extreme caution, and should also stay off the freshly-painted lines to prevent damage to their vehicles. The epoxy used to paint the lines on high-traffic roads lasts upwards of 4 years. The latex used on lower-traffic roads lasts for around 2 years.