RATP has developed a CO2 calculator available directly from the homepage of the company website. Every time a request is made for a trip, the results page indicates the CO2 impact of the travel. Two values are given and show the CO2 equivalent emissions due to traction energy for one passenger:
- CO2 emissions generated by using public transport (distance hypotheses for public transport are ‘as the crow flies’ distances between each stop for all modes)
- CO2 emissions generated by the same trip done by using the car (distance hypotheses for car are ‘as the crow flies’ distances multiplied by the correction factor defined for the Ile-de-France Region).