Warp wrote:
>   Not all roads have the same weight. Some of them are marked as being
> more desirable than others.

I guess things like one-way roads you'd just have two different distance 
metrics, too.

-- 
   Darren New, San Diego CA, USA (PST)
   "Ouch ouch ouch!"
   "What's wrong? Noodles too hot?"
   "No, I have Chopstick Tunnel Syndrome."

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