Evolution in Local Traffic Impact Assessment Practices

This study evaluates the state of traffic impact assessment (TIA) practice at the local level in North Carolina and the Washington D.C. metro area. Using semistructured interviews and surveys of staff involved in the development review process in sixty-three jurisdictions, we conclude that the conventional, automobile-oriented approach to TIA remains the dominant model in the study area, although our research reveals efforts to modify practice. Content analysis of interviews in thirty-six jurisdictions indicates lack of information and technical capacity are substantial barriers to change, highlighting areas in which planning education and research could better support practice.