My entry for the June 2015 MTC. As per the theme, all driving blocks change the height of the car, except for the start, finish, and two of the 3 CPs.
The map is fully restartable, and provided you reach the first CP, simple enough to complete slowly. However, getting a fast clean run is very challenging. Done well, it is a very flowy and pretty map.
The AT of 48.49 comes from me nolifing it a bit to master my own track, but I am confident that a player with more driving skill could finish in 48.1x or lower, especially if he or she can clear the speedbump and fullspeed the turn through the second CP (I did it on an exceptionally good run and then promptly screwed up!)
GPS:
(48.52, very close to AT for what it's worth)
Intro:
No custom blocks were used, because I felt like that would ruin the challenge
Enjoy!
-bwbigmac