Fuck it, just take your bike or car to the drags and get the timeslip. Make some copies and carry them in the car. If everyone does this we can simply exchange timeslips at the lights. "Ah, I see your vehicle is .2 of a second quicker than mine over the old standing quarter, good show old bean". Then you can both gently and legally accelerate to the speed limit having safely and accurately calculated this duel on paper without causing any public nuiscance.