Dude, Where's my Road?

Oh no! The race is about to start, but someone forgot to make sure the track was in place beforehand. I guess we're just doing it live.

In this role-reversed racer it's up to you to place track pieces down before the driver reaches the end of the existing track. Complete the loop and allow the driver to cross the finish line to win.

Controls
LMB - Select a track piece/Place a track piece
'R' - Rotate selected track piece
RMB/Esc - Deselect track piece
Mouse - Move placement of selected track piece