Below you will find descriptions for each of the WorldCommute measurements and how these numbers are calculated.
The world rankings are determined by adding all of the normalized data in the system for each "group" of entries. The normalized data is cost savings for each currency, carbon offset in lbs, health points, distance in miles, and fuel savings in gallons. A result group is an entry's country, region, mean, and reason. So we add all of the normalized data for 'bicycle traveled' (means) 'to and from work' (reason) for 'Colorado' (region) in the 'United states' (country).
Total number of all days with participation miles recorded from account signup date to present.
Total distance traveled including all modes (bike, walk, run, skate, etc) and reasons ) commute to work or school, taking care of business, fitness, recreation)..
Amount of fuel saved by choosing human-power instead of vehicle trips for commute and taking care of business (TCB) miles.This number based on your vehicle efficiency for individual results, based on national averages for World Results.
Amount of money saved by choosing human power for commute and taking care of business miles based on fuel consumption of the vehicle (or national average if you do not own a car) you are leaving behind and the price of fuel in your area.
Amount of carbon pollution offset by choosing to leave your car behind. These numbers based on commute and taking care of business trips using the following EPA formula:
AUTO EMISSIONS = TRIP_MILES / MPG * POUNDS_OF_CARBON_DIOXIDE / POUNDS_PER_METRIC_TON
AUTO EMISSIONS = MILES / MPG * 19.36 / 2205
The quotient is multiplied by 19.36, the amount in pounds of carbon dioxide emitted as a result of burning one gallon of gasoline. The product is divided by 2,205, the number of pounds in a metric ton.
1 Mile + .96 pounds of reduction of carbon dioxide emissions per gallon of gas. The average car emits about 19.4 lbs of CO2 per gallon of gas. We took that number and multiplied it by gallons of gas saved by leaving your car behind and came up with about .96 lb reduction in emissions for each mile you leave the car behind.
Additional calculation information provided by the following:
US Department of Energy, Office of Policy and International Affairs, “Technical Guidelines: Voluntary Reporting of Greenhouse Gases (1605(b)) Program,” March 2006, Table 1.D.1, p. 64,
Activity score based on type of human-powered transportation multiplied by the number of miles completed. All miles logged contribute towards health points.
- Activity score for commute to work or school, Taking Care of Business Miles, and Recreational/Social as follows:
- Walking = 3
- Cycling & Other = 4
- Skate = 5
- Run = 6
- All types of fitness activities = 7
- Bike Commute (activity score = 4) × 10 miles = 40 Health Points
- Fitness bike ride (activity score = 7) × 20 miles = 140 Health Points