NATIONAL COOPERATIVE HIGHWAY RESEARCH SYNTHESIS OF HIGHWAY PROGRAM159 PRACTICE DESIGN AND CONSTRUCTION OF BRIDGE APPROACHES RESEARCH SPONSORED BY THE AMERICAN ASSOCIATION OF STATE HIGHWAY AND TRANSPORTATION OFFICIALS IN COOPERATION WITH THE FEDERAL HIGHWAY ADMINISTRATION TRANSPORTATION NATIONAL RESEARCH COUNCIL WASHINGTON, D.C. RESEARCH BOARD JULY 1990 Topic Panel HARVEY E. WAHLS North Carolina State University Raleigh, North Carolina ROBERT E. BOAGNI, Louisiana Department of Transportation and Development BERNARD E. BUTLER, New York State Department of Transportation ALBERT F. DiMILLIO, Federal Highway Administration G.P. JA YAPRAKASH, Transportation Research Board EDWARD G. KEANE, Utah Department of Transportalion VASANT MISTRY, Federal Highway Administration DONALD R. McNEAL, Pennsylvania Department of Transportation GARY C. WHITED, Wisconsin Department of Transportation