Agenda - 05-15-1990 (2) - Laserfiche WebLink

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1� ` r COPY NCD07 NCDOT RECOMMENDED TYPICAL CROSS SECTIONS Typical Cross Sections Typical cross sections recommended by the Thoroughfare Planning Unit are shown in Appendix A, Figure 1, and listed in Appendix B, Table 1. Cross section "A" is illustrative for controlled access freeways. The 46 foot grassed median is the least desirable median width but there could be some variation from this depending upon design considerations. Slopes of 8:1 into 3 foot drainage ditches are desirable for traffic safety. Right -of -way requirements would typically vary upward from 250 feet depending upon cut and fill requirements. Cross section "B" is typical for four lane divided highways in rural areas which may have only partial or.no control of access. The minimum median width for this cross section is 30 feet, but a wider median is desirable: Design requirements for slopes and drainage would be similar to cross section "A", but there may be some variation from this depending upon right -of -way constraints. Cross section "C ", seven lane urban, and cross section "D ", five lane urban, are typical for major thoroughfares where frequent left turns are anticipated as a result of abutting development or frequent street intersections. Cross sections "E" and "F" are used on major thorough- fares where left turns and intersecting streets are not as frequent. Left turns would be restricted to a few selected intersections. Cross section "G" is recommended for urban boulevards or parkways to enhance the urban environment and to improve the compatibility of major thoroughfares with residential areas. A minimum median width of 24 feet is recommended with 30 feet being desirable. Typical cross section "H" is recommended for major thoroughfares where projected travel indicates a need for four travel lanes but traffic is not excessively high, left turning movements are light, and right --of -way is restricted. An additional left turn lane would probably be required at major intersections. Thoroughfares which are proposed to function as one -way traffic carriers would typically require cross section "I ". Cross section "J" and "K" are usually recommended for minor thoroughfares since these facilities usually serve both land service and traffic service functions. Cross section "J" would be 41