TEXT: Traffic services Sergeant Kevin Henkel inserts his ticket to ride the public bus system Friday, Dec. 7, in Sioux Falls. Public transit costs taxpayers millions each year. That's why a task force has been set up to study the issue with assistance from staff at the Harvard Bloomberg Institute. A part of the task force's work is engaging bus riders and the general public, so members were at the bus depot at 9 a.m. Friday to talk to riders and ride the buses.