[ODE] Collision Space Suggestions Wanted

[Jeff Weber]

I have a single vehicle with 4 sphere-geom tires and a box-geom body.

I have a road/highway made up of box geoms all strung together.

What is the best way to set up my collision spaces to get max performance.  
I'm trying to decide if I should use SimpleSpace, HashSpace, or the new quad 
tree space.

Currenlty, I have a simple space for my vehicle, and I have my road geoms 
set up as a hiearchy of simple spaces 3 levels deep.

Any suggestions are appreciated.  I expect to have approx 4000-8000 
box-geoms per road.

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