JOpt enables fleet operators to reduce overall CO2 emission ! - Since version 2.2.0 (codename GREEN) the JOpt Vehicle Routing Optimizer comes with a built in emission assessment and optimization scheme that allows fleet operators to determine and optimize their overall carbon dioxide emission. Beside calculation of the overall and per route emissions, JOpt determines an optimum schedule with optimum energy efficency in terms of trucks payload to empty ratio as well as overall road mileage. Hence vehicles are automatically dispatched in a way that leads to a minimum carbon dioxide emission.