I think you also need to account for stopping distances and acceleration. A bike can stop in far shorter distances than a car can (and will be travelling at a

I think you also need to account for stopping distances and acceleration. A bike can stop in far shorter distances than a car can (and will be travelling at a lower speed in the first place). Bikes are also slower to accelerate than a car. Allowing a bike to maintain more of its momentum gets it through the intersection quicker, especially on any kind of uphill grade. Anecdotal, perhaps, but I know that my personal experience has been that the combination of those two things means that I'm evaluating whether it's safe for me to pass through an intersection and making the decision much sooner on a bike than I would in a car where the assumption is I need to mostly stop because I may not be able to otherwise.