Sioux Falls police targeted about two dozen people with warnings each day during the first week of a campaign aimed at enhancing safety on city streets.
The push to change behavior was prompted by a summer of fatal accidents involving motorists, pedestrians and cyclists. There have been 16 accidents in Sioux Falls this year involving vehicles and bicycles, including the death of a 22-year-old woman about a month ago.
Officers this week will stop issuing warning tickets in favor of tickets that carry fines.
Some bicyclists say they hope the push for change extends beyond traffic enforcement and into driver's education courses.