[Contest] Public transportation - low floor buses (my entry)

This contest is my first contest!
Make your own low floor buses.(adventure scale)

Rules
*Use RC
*suspension must equipped to less dizzy.
*Make buses can Adjust the height
*No stairs for passengers.(But if just for driver, stair is ok.)
*No too much speed or less speed.
*No LUA.
*Bus should have capacity for 20 or more of robot.