Re:Slower speed does increase congestion...but (Score 1)

Yeah, I know it's not *that* simple, but I guess what I was getting at, is that even with an incredibly simple model (increase speed, reduce journey time), this is affected by the increased severity of accidents - which represent a critical failure of the road network. But the algorithm is correct in its own terms (mean journey length, speed limit) means that there is a minimum mean time a journey can take. But of course traffic behaves like the weirdest fluid ever. It doesn't just expand and contract at high and low speeds, it also gets angry (and I don't know how to model that.)