Yazar
david l harkey
5 cilt bulundu.
David L. Harkey · U.S. Dept. of Transportation, Federal Highway Administration, Research and Development, Turner-Fairbank Highway Research Center
47 sayfa · 1998
Route choice / Traffic safety / Bicycle trails / Bicycle commuting
David L. Harkey · Available through the National Technical Information Service
59 sayfa · 1994
Traffic accidents / Truck accidents / Speed limits
David L. Harkey · U.S. Transportation, Federal Highway Administration
324 sayfa · 2004
Pedestrians / Safety measures / Pedestrian facilities design / Pedestrian accidents
David L. Harkey, Turner-Fairbank Highway Research Center, University of North Carolina at Chapel Hill. Highway Safety Research Center · Available to the public through the National Technical Information Service
86 sayfa · 1998
Bicycle commuting / Bicycle trails / Traffic safety / Route choice