Google maps has included bicycling directions. “This has been a top-requested feature from Google Maps users for the last couple years,” says Shannon Guymon, product manager for Google Maps. “There are over 50,000 signatures on a petition.[link]”Interesting points: Apart from providing congestion info to cyclists, it also provides a feedback mechanism[link]. Also I found the mechanism to estimate time very interesting -- from Google blogspot: Our biking directions are based on a physical model of the amount of power your body has to exert given the slope of the road you’re biking on. Assuming typical values for mass and for wind resistance, we compute the effort you’ll require and the speed you’ll achieve while going uphill. We take this speed into account when determining the time estimate for your journey, and we also try hard to avoid routes that will require an unreasonable degree of exertion [link]. Please view the attached sample map.
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