How do I reset the spawn point on a map?

I have a map which spawns the car 1 kilometer in the air, resulting to a violent crash. I need to reset the spawn point on this map so it spawns on the ground, how can this be done??

 

When you get to the ground, press Ctrl R. That will reset the spawn point on the ground. From there, move you car to whatever position you want it and press it again if you need to. Another way this can be done is by doing F8 to go into freecam and F7 to teleport your car to your camera position, and from there, Ctrl R.