1. A system for managing electric and fuel cell vehicles in a fleet comprising: a plurality of vehicles, each vehicle having a sensor measuring remaining electrical energy available from electrical cells or fuel cells as a first data item, a GPS sensor measuring vehicle position as a second data item and a first communications device transmitting the first and second data items, and a computer having a task input means, a second communications device receiving the first and second data items and a data base associated with a means for predicting vehicle range from the first data item, the computer linking task inputs with predicted vehicle range and the second data item.