Yazar
randal s johnson
2 cilt bulundu.
Cilt sonuçları
Pedestrian safety impacts of curb extensions
Randal S. Johnson · Oregon Dept. of Transportation, Research Unit
24 sayfa · 2005
Evaluation / Safety measures / Unsignalized intersections / Curbs / Pedestrians
GIS mapping of environmental justice census characteristics
Randal S. Johnson · Oregon Dept. of Transportation, Research Unit
14 sayfa · 2004
Maps / Census districts / Environmental justice / Geographic information systems / Transportation and state