Show MINIMUM WIDTH OF HIGHWAY r I I I Surface Hard-Surface Roads Should Be at I 1 I I Least Eighteen Feet Wide for Ij Safety of All Concerned j I Prepared by the United State Department I j f of Agriculture IA I IA A minimum width of 18 feet for fop hard surface hard surface roads Is recommended by bythe bythe I Ithe the bureau of public roads of the United States Department of ture The maximum width of truck body generally permitted Is 8 feet and 5 feet Is the ordinary clearance width of automobiles At an average a c speed of 30 SO miles an hour It Is unreasonable unreasonable un un- 1 I reasonable to expect the driver of ot an automobile to drive with the wheels wheela closer than 1 s 11 feet to the edge of the pavement says sas the bureau For trucks at an average speed of 15 miles an hour this distance should not i I I II I J i i I II i I I b I Ir m E r rr f l 4 4 t v. v lI l. l A j f IL kJ i t I Sheridan Big Horn Road In Wyoming t Before and After Improvement I be less than 1 1 feet on account of the great reat width of the rear wheel I Three feet seems to be a minimum safe clearance between bodies Inasmuch Inasmuch Inas Inas- much as a certain amount of of truck traffic raffle Is to be expected on all aU main country roads the minimum width of surface should be 18 IS feet to provide i these clearances when an automobile meets a truck Where the she he frequency with which trucks pass each other becomes a big factor as In the neighborhood of large cities the minimum width of pavement pavement pave pave- ment should be 20 feet to provide prO a clearance of 3 3 feet and a n safe distance distance dis dis- tance of wheels from edge of pave pave- ment nent I |