"Traffic engineering." . . "Wolshon, B." . . "National Research Council (É.-U.). Transportation Research Board." . . "Transportation engineering." . . "National Cooperative Highway Research Program." . . . . "Convertible roadways and lanes : a synthesis of highway practice" . "Convertible roadways and lanes : a synthesis of highway practice"@en . . . . . . . . . . . . . . . . . . . "Convertible roadways and lanes a synthesis of highway practice"@en . "Convertible roadways and lanes a synthesis of highway practice" . . . . . . . . . . . . . . . "Convertible roadways and lanes"@en . "Convertible roadways and lanes" . . . . . . . . . . . . . . . "Transportation Research Board. National Cooperative Highway Research Program" . . "Roads Accessories." . . "Traffic signs and signals." . . "Alternerende-vognbaner" . . "Lambert, L." . .