[Rez]

Scale times is just a matter of math. If I have the actual numbers, I can just massage them to scale numbers.

Traps would require beams. One per lane per trap. Technically I could just add more beams to the foul/finish circuit and use logic to figgure out which one is being broken, thus requiring no additional IO pins. Unless a car goes airborn and jumps over a beam, or reverses, it has to pass them in order...