I think a cone should be used as well. It forces all the cars to stay in line and rarely have I seen a problem when it is used. The only big issue has been if a car doesn't take off, but all that does is allow the cars in front of them to gain some distance on them. I've never seen an accident created because it is in the drivers head that they can't pass before that cone. It creates a definitive line of when they can and can't pass. IMO...it creates more gray area and judgement calls without it.

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