#amilmand :
You can but you would have to give the control of the players car away to a bot (only one controller can have control over a given car either player input or the bot) with a script like
you would probably have to reset the camera aswell
You could perhaps monitor player input in a track's handleevent or similar method and give back control to the player upon keypress
raceBot.leaveCar(0);//traffic id should be 0
player.controller.command( "controllable " + player.car.id() );