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98 <br /> General Disclaimer <br /> The Level of Service D Standards for Systems Level Planning was <br /> derived from the 2005 North Carolina Level of Service (NCLOS) <br /> Version 2.1 Program developed by the Institute for Transportation <br /> Research and Education (ITRE) at North Carolina State University. <br /> The NCLOS Program is based on the 2000 Highway Capacity <br /> Manual, published by the Transportation Research Board (TRB). <br /> These standards are intended for systems level planning only. <br /> Many assumptions are made and documented in the development of <br /> these standards. <br /> CTP FACILITY TYPES <br /> FREEWAYS represent a multi-lane divided facility with complete <br /> access control (interchanges only and no traffic signals). <br /> EXPRESSWAYS represent a multi-lane divided facility with a high <br /> level of access control (interchanges, limited at-grade intersections, <br /> right-in/right out access, and no traffic signals). <br /> BOULEVARDS represent a typically divided facility with moderate <br /> access control (at-grade intersections, right-in/right out access, and <br /> traffic signals at major intersections). <br /> OTHER MAJOR THOROUGHFARES represent undivided facilities <br /> with four or more lanes (US and NC routes may have less than 4 <br /> lanes). These facilities typically have low access control (at-grade <br /> intersections, access to development, and traffic signals at major and <br /> some minor intersections). <br /> MINOR THOROUGHFARES represent a 2-to-3 lane undivided facility <br /> that is not signed as a US or NC route. These facilities typically have <br /> low access control (at-grade intersections, access to development, <br /> and traffic signals at major and minor intersections). <br /> 3 Updated 10/14/2011 <br />