Free Ramp Shape

I have drawn a large (16000' L x 960' W x 3200' H) ramp in Sketch-up, which should provide a non-damaging 10+ seconds of airtime for three different speed classes of cars. I'm no good at the in-game interface, but I'd hate to see it go to waste. So I'll upload the exported .dae file here, and anyone who wants can use it for free, no credit necessary. I'd just want to know where, so I can try it in-game.
View attachment 87333
EDIT: Should be zip file with materials now.
EDIT 2: Ramp...

Free Ramp Shape