R. Roe Presentations Documents There are no presentations from this contributor. NCHRP | 2013 NCHRP Report 687: Guidelines for Ramp and Interchange Spacing Published by: NCHRP Authored by: Brian Ray Co-authored by: J. Schoen , P. Jenior , J. Knudsen , R. Porter , J. Leisch , J. Mason , R. Roe
