Take a look to the track in that video:

http://www.youtube.com/watch?v=bd5ywJtuUG0&NR

That was the monza rally show 2005


It would be fun if we could have the ability of setting up an autocross (or track) layout with that double sided start line

that will be cool, i like it, but people will start to say the only 2 at time will be boring, only 2 have fun at time, its not racing its time-trial, blah, blah, blah...

It have to be a possibility of doing that, not an obligation on doing only that.
Said in that way people can't say no