http://www.aaroads.com/nevada/images...erarterial.jpg
A few illustrative images, this would be the view for the drivers coming through the tunnel, westbound. Just past the top of the hill, they'd have to make a hard left into the parking lot of Fashion Show mall. Fortunately, this is a county highway, not state, and could probably be shut down a few hours at a time for the on-track sessions.
http://www.vegasgallery.com/galleryImages/DesInn4F.jpg
Now in this picture, the cars will be coming from the road in the left half of the photo starting at the top, next to the golf course, will disappear into the tunnel, run through the parking lot, then emerge at the intersection in the very lower right corner of this photo, then head up the strip to the left.
http://www.vegasgallery.com/galleryImages/CircCir5F.jpg
And here's the Circus Circus... I'm sure you can use the big purple dome to orient this picture in your mind.
http://www.vegasgallery.com/galleryI...LasVHilt6F.jpg
This is a view looking backwards through the Hilton esses.