On Wed, Aug 28, 2013 at 7:57 AM, Fernando Trebien < fernando.treb...@gmail.com> wrote:
> However, routing would double count traffic lights in two-way roads > (as in Kytömaa's counting), though guessing the direction by proximity > to the intersection should be accurate here in about 99% of the cases, > as would be for stop signs. The double (or triple) count of traffic signals is something the routers need to model anyway. As has been pointed out, traffic engineering practice is to synchronize such lights. Even in places that deliberately mis-time signals to reduce flow, three intersection length signals would be coordinated. We don't need to tag to the router! The simple intersection node tagging is enough for good routing! (Google or Apple's routers have an advantage here: they don't have to count signals as they can count average travel time.)
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