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AJPH First Look, published online ahead of print Jan 31, 2006
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Policy and Programmatic Importance of Spatial Alignment of Data Sources

Paul Ong, PhD, Matthew Graham, MA and Douglas Houston, MA

Paul Ong is with the School of Public Affairs and the Ralph and Goldy Lewis Center for Regional Policy Studies, University of California, Los Angeles. Matthew Graham is with Abt Associates, Cambridge, Mass. Douglas Houston is a doctoral student in urban planning at the University of California, Los Angeles.


Figure 1
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  		FIGURE 1—— Calculating total vehicle miles traveled (VMT).

Note. AADT = annual average daily traffic.

 




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