World trends of urban population growth are already high, but motorization growth trends are much worse. In developing countries motorization is not only high, but also its rate is uncontrollably high, reaching rate over 10% per year. During the traffic jams, general average speed of all the vehicles is kept slow that the emissions of pollutant gases are evidences to be much higher than in a kilometer per person basis. Motorization tends are truly astonishing but alsohere the income-level distribution plays a key role in developing countries. The present study investigates features of sustainable transportation environment and future prospects for the adaptation policies of developing countries based upon Model Reference Adaptive Theory. In the case of La Paz City, Bolivia, the income-level distribution has a great influence on daily life citizens. The number of vehicles that cross each of the network on each peak period for each income level and trip purpose is estimated using GIS. The buses would provide service for the most congested routes and the current vehicles would feed the big buses system. Through this adaptive policy, the congestion would be significant reduced.