U-Drive-It

U-Drive-It, also known as UDI, is a mode found in the "My Sims" mode what allows you to take control of various transit vehicles in a city. They include cars, trucks, buses, trains, planes, ships, tanks and monorails.

UDI came out in the Rush Hour expansion pack, and you can also play UDI missions to get certain rewards, a boosted mayor rating, or Simoliens (money). Be careful though, if you fail the missions, you could lose mayor rating or Simoliens.