I read this thread at
https://www.interlopers.net/forum/viewtopic.php?p=17640 which tells you how to make a driveable car. Turns out the tutorial was written by SlayerA so all thanks and credit goes to him!
The map uses
1 game_ui , 2 logic_compare , 4 phys_thruster
to drive and steer a small radio-controlled car.
The rc_car is a func_physbox and is propelled / steered by the 4 thrusters attached to it,
by using the WASD keys (or whatever keys you normally use for movement)
If you press Attack1 (mouse1) while controlling the rc_car, it will explode. This was just for fun ^^
additional info is in the readme text file in the .zip
And the rc_car's handling is REALLY poor, so... sorry, but this should show you how to use a game_ui and logic_compare :]
I believe habboi of all will have good use for this.
So habboi, what did I tell you, hm? Game_ui.