An extensive study of 4-lane to 3-lane conversions

ROBERT STEUTEVILLE OCT. 1, 2005

An extensive study of 4-lane to 3-lane road conversions in Iowa demonstrated a 25 percent reduction in accident frequency and a 19 percent reduction in crash rate. The 23-year study was by Iowa State University and Iowa DOT. See www.dot.state.ia.us/crashanalysis/fourtothree_iowa.htm

Robert Steuteville, F-CNU, is editor of Public Square: A CNU Journal and senior communications adviser for the Congress for the New Urbanism.

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