Except, if that were the case, all of the cars would then be travelling in very close proximity to each other. This would only work if we all stopped at the lig

Except, if that were the case, all of the cars would then be travelling in very close proximity to each other. This would only work if we all stopped at the lights with the same space between stopped cars as moving cars. Of course, in a fully autonomous road network this is both possible, and mostly unnecessary, as nobody has to stop at traffic lights any more. Apart from pedestrian crossings of course.