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Rural Roads-Minimum Width of Travel Way and <br /> Shoulders(Design Speed 15 to 50 mph) <br /> 400 to 1500 to over <br /> Veh/day Under 400 1500 2000 2000 <br /> Travel Way <br /> width each 9 10 11 12 <br /> directions,ft. <br /> Shoulder width <br /> each side (all 2 5 6 8 <br /> Speeds),ft. <br /> Roadway Width, 22 30 34 40 <br /> ft. <br /> "A major part of the rural highway system consists of two-lane local roads. These roadways <br /> should be designed to accommodate the highest practical criteria compatible with traffic <br /> - and topography." <br /> "Roads should be designed for a specific traffic volume and a specified acceptable level of <br /> service. The average daily traffic volume, either current or projected to some future design <br /> year, should be the basis for design. Usually,the design year is about 20 years from the date <br /> of completion of construction." <br /> Source: 2004 Geometric Design of Highways and Streets, page 380 &384 <br /> by the American Association of State Highway and Transportation Officials <br />