A Policy on Highway Classification |
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10-hour traffic 2-lane road 3-lane road 5-minute interval 50 miles accordance therewith AMERICAN ASSOCIATION approved traffic density assumed design speed assumed period capacity as defined cause appreciable congestion Character of Traffic Chief Engineer Class congestion results construction D. C. GREER day maximum Dean A. N. Johnson Department of Highways factor grade heavily traveled HIGHWAY CLASSIFICATION Highway Department Highway Engineer HIGHWAY OFFICIALS Highway Research Board Highway Traffic Analysis hindrance to smooth hourly rate indicates a highway Massachusetts maximum 5-minute maximum capacity maximum hourly count maximum hourly traffic maximum traffic capacity maximum traffic density method of classification miles per hour number of vehicles numerical peak days peak load percentage of trucks POLICY ON HIGHWAY public demand R. H. BALDOCK reduce traffic capacity relative traffic capacities report by A. N. Research Board recommended safe speed secondary road Sigvald Johanneson smooth operation speed of 50 SPEED WITHOUT APPRECIABLE traffic density classification vehicles per day