Systems, methods, apparatuses, and computer program products are provided for determining carbon emissions of one or more vehicles. For instance, in one example embodiment, an apparatus may calculate miles traveled by the vehicles along a predefined route and may calculate a fuel usage of the vehicles for traveling along the route to obtain one or more fuel values. The apparatus may also analyze data indicating the miles traveled and the fuel values to determine fuel efficiency values corresponding to the vehicles traveling the route. The apparatus may also determine an estimate of an amount of carbon emissions for each of the vehicles based in part on applying at least one carbon emission value to respective fuel values associated with corresponding determined fuel efficiency values.