For this challenge, you have accelerate, and then stop before you hit the barriers. Make sure you accelerate and brake hard, because the time limit is pretty tight with this one. Brake when you reach the stop signs!
In the unlikely event that the road is not straight, you may need to stop accelerating and use your vehicle's steering wheel. [br][br]Try it here on the roundabout, but watch out for the slippery area.
Next up there will be a few more turns, on a narrow road. Try to find the proper speed for those tight corners. Again, try to slow down going into a corner. Don't hit any pylons!