27 Apr '12, 4pm

How transit-friendly is your city? Walk Score has a new ranking of 25 US cities

How transit-friendly is your city? Walk Score has a new ranking of 25 US cities

Calculating the Raw Transit Score To calculate a raw Transit Score, we sum the value of all of the nearby routes. The value of a route is defined as the service level (frequency per week) multiplied by the mode weight (heavy/light rail is weighted 2X, ferry/cable car/other are 1.5X, and bus is 1X) multiplied by a distance penalty. The distance penalty calculates the distance to the nearest stop on a route and then uses the same distance decay function as the Walk Score algorithm. Normalizing Scores from 0 to 100 Since any measure of transit infrastructure (number of stops, number of weekly trips, etc.) will have its own unique range, it is necessary to normalize the raw Transit Score to generate a Transit Score from 0 to 100. The amount of transit infrastructure can vary by several orders of magnitude. Scales for measuring things that have an extremely large range of norma...

Full article: http://www.treehugger.com/public-transportation/walkscore...

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