lining up the cars

at the corner of the track where the cars line up a fence should be put up so the next round of cars or vans can be lined up ready. it would be safer for the start line marshall. the time taken lining the cars up could be used to give everyone an extra race. a race takes 3 minutes and about a minute to line up. I've drawn a picture and marked the fence in red.

ON VIEWING THE PICTURE , I THINK IT WOULD BE DANGEROUS TO COMPETITORS TO HAVE A FENCE IN THIS AREA AS THE TRACK IS NOT WIDE ENOUGH . THE CARS ARE LINED UP READY BUT IN A SAFE AREA AWAY FROM THE TRACK .