Just got my first vehicle in this game, the old rusty 4x4. While I was crawling along the ground in the vehicle I was overtaken by a speeding slug. I tried all the controls on the xbox controller on my pc. Nothing I could not accekerate at all even following the intructions and looking at the mapping withing the game.
I would have thought:
Left trigger accelerate
right trigger slow down
left stick to stear
The rest are sort of OK. I might even try mind control because swearing at it foes not work. At the moment it looks like I will be on foot
EDIT: When it does move forward it is moving in a jerky movement
EDIT 2: I have tried all controls, handbrake, brake, unlock and I can move faster with both my legs in splints. It is as though the rear wheels are locked. I have tried lock and unlock. No go it is still not good.