Krupnick, Alan J. <br/><br/>
Measuring the effects of urban transportation policies on the environment: a survey of models. 

 - Washington :  World Bank,  1992. 
<br/><br/> Air pollution from urban travel is influenced by trave demand by its distribution among modes, by congestion, and by the characteristics of vehicles and fuels. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Transport Policy.<br/>Transportation policies -- Environmental aspects.--Transportation policies -- Environmental aspects.