Research and applied practice have attempted to define the nature of land use and travel behavior for several decades. An increasing number of studies have suggested that land use can also indirectly influence emissions of airborne pollutants that are largely produced through the use of internal combustion engines operated in private automobiles and trucks, among other point and area sources. The theories have a similar origin, suggesting that land use patterns influence trip making frequency, trip lengths, choice of what mode of transportation to take, and so forth. The overwhelming majority of conclusions cite that land use patterns do (1) influence the trip making behavior of individuals; and (2) when measured, these travel changes in turn influence emissions from private automobiles and trucks when measured over a broad area.
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