Take a ride up and down Main Street USA from the second story of the Omnibus. The Omnibus is a gas-powered, open-air 2-story bus and is one of several vehicles you can ride on Main Street USA at the Magic Kingdom.
The Omnibus is part of Main Street Transportation. Other cars include a Horse-Drawn Street Car, A Jitney (An early automobile without a roof) and the Fire Engine. You'll see all of these cars in this video. Main Street Transportation operates from park opening 9am until 10:15am.