Orange County NC Website
Browse       Search
088501 .. <br /> Transportation Impact Report • <br /> April 11,• 3988 " <br /> Page Four <br /> • <br /> Existing Road Conditions: <br /> • <br /> Per the NCDOT manual "Highway Capacity", levels of service <br /> and maximum service- volumes on a two-lane highway under uninter- <br /> rupted flow- conditions (Normally representative of rural . <br /> operations) . <br /> • Flow in both directions <br /> Level of Service: Descrintion per hour <br /> El -Free f low 400 cars <br /> 8 • Stable flow 900 cars - <br /> C Stable flow 1400 ears <br /> D Approaching unstable - _ - <br /> flow - . 1700 cars - <br /> E Unstable= flow 2000 cars - <br /> F Forced flow _ . widely. variable <br /> * See Appendix 8 for definitions. <br /> Deterrainatio of Intersection Cana t <br /> The- intersection capacity analysis for use in site planning _- <br /> application is based on the "Critical Movement Summation" <br /> technique developed by McInerney and Petersen. Table II gives <br /> the capacity ranges of an intersection for each level of <br /> service. <br /> • <br /> Intersection Capacity by Level of Service - . <br /> Level of Service Ranee of Cam ac.it (VP!!) <br /> Low High . . <br /> A - " 0 9O0 <br /> 901 1050 <br /> C 1051 1200 <br /> D - 1201 1350 <br /> E 1351 1500 <br /> F (Special case) 1500 - <br />