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GG 50 <br /> trend towards smaller household sizes In 1970, the Census <br /> reported that the average house old in Hillsborough Township <br /> has 3.-41 persons. 53 1980, that had- dropped to 2.66 <br /> *fiersons. <br /> Circulation <br /> The County's major east/west and north/south transportation <br /> routes intersect in Hillsborough Township, making it a <br /> central point in the County transportation network. The <br /> east/west corridor consists of I-85r US70, and the Southern <br /> Railroad. The north/south system consists of two State <br /> Highways,ghways, NC86 and NC57f along with two important local <br /> roads, Old NC86 (SR10'09) and Orange Grove Road (SR1006) . Upon <br /> completion, 1-40 will link up with 1-85 just west of Town. <br /> A modified version of the North, Carolina Highway 'Functional <br /> Classification System is used to describe the road network in <br /> Orange County. The system describes segments of the road- <br /> network based on mobility and access factors. The most <br /> important roads, Interstates and arterial highways,, provide- <br /> the best level of service as measured in travel time to and <br /> from major activity centers. Roads of lesser importance, <br /> collector roads, do not provide as high a level Of service, <br /> but do provide areas with access to major roads and secondary <br /> access to activity centers. Local roads provide the most <br /> limited service capacity, but, in the aggregate, provide <br /> large land areas with access to more important roads and <br /> highways. <br /> Interstates 40 and 85 are designated as Interstates, while <br /> five roads in the township are classified as arterial roads; <br /> US70 and its Bypass,, NC86, NC57,, Old NC86, and St. Mary's <br /> Road (SR1002) . St. Mary's Road angles . northeast out of <br /> Hillsborough and provides a major route between Hillsborough <br /> and northern orange County. Orange Grove Road (SR1006) and <br /> Old NC10 (SR1710) are classified as collector roads. All <br /> other roads provide a local level of service. <br /> The objective of qLay comp transportation 9nent of a trans tion system <br /> I c <br /> cl way <br /> such h to acc odate-a Q22 <br /> amount of traffic while providing the 22erator with an <br /> service C 31.8 <br /> accept3BIe 1 eve 1 o 68-jVilce. -A level of -nVay an <br /> as an appropriate criferion or niq <br /> street design-purposes and is defined by the North Carolina <br /> tat�ion as a zone of <br /> stable with <br /> Department of Transoor e tIOW <br /> ab! more c ontrgll - <br /> . ' _ <br /> volumes. Levels of service ran- -ce from 'A which is a <br /> 4 <br />