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THE PRESCOTT COMPANY LLG <br />Post Office Box51878. + Oarhau-� NDA Carolina + 27717 <br />Phone (919) 698-2863 t Fax (919) 493-7950 • Email prwcoMWCa)yq=nnet <br />December T5, 2006 <br />NIr. Howard A. Partner, R.L,A, <br />Howard A. Partner Landscape Architecture <br />2110 Woodrow St. <br />Durhani, NC- 27705 <br />RE, Carramore Subdivision Average Daily Trips, (ADT) <br />Kerley Road (SR 1717)., Orange County, NC <br />F -. M - I <br />We have evaluated the proposed subdivision road access for the: Carranaore Subdivision <br />onto Kerley Road in Orange County, NC. Carramore Subdi*ion-Is an 8-10f -single.,- family - <br />detached housing development with a proposed Residential Limited, roadway crossLasedion under <br />City/County of Durham re ' gulations. In addition, the project is planned to provide a residential <br />limited roadway connection to the adjacent Quail Ridge gubdMsion, an approved 84-lot single- <br />family detached housing developr ent, to the south. Conservatively, we split one-third of <br />Quail Ridge Subdivision traffic through the Carramore access route for the pUrpo§6 of ttilffi6 <br />assignment, This assignment of dips is conservative because the other two, entrances to Quail <br />Ridge subdivision have more direct linear roadway access to local arterial roads, Erwin Road and <br />Comwallis Road, which connect directly to the High Bypass. In our judgment, the <br />Highway <br />"Residential Limited" clasg of roadway and the curved alignment of the Carramorer Subdivision <br />1. <br />roads will not encouia& through traffic from Quail Ridge Subdivision futuie tesidbntg.. <br />From Land. Use 210 of the Trio Generation Manual, 7A - Edition {Institute of <br />Transportation Engineers, 2003), the*aVerage rate of vehicle trip ends which may be expected <br />from single-family detached housing developments is equal to 9.57 trips per dwelling unit. Single- <br />family detached housing is defined as detached homes on individual lots. By applying this rate to <br />the proposed subdivision (8 units) and one-third of the proposed Quail Ridge Subdivision (2.$ <br />units), 345 day trips are expected to be generated- This traffic may be added to the exiffitig, daily <br />traffic occurring on Kerley Road <br />Since current NCDOT Traffic Maps do not indicate ADT for Kerley Road, counts we're <br />performed Tuesday through Thursday, 12/5-1.2/07/06 (attached Memo), with a resulting average <br />daily ADT count of 2391_ * By adding trip generation o ' f 345 to ADT of 2391, a resulting ADT on <br />Kerley Road of 2736 is obtained. An ADT of 2736 is less than the NCDOT threshold of an ADT <br />of 4000 to require Kerley Road widening for a turn lane. Therefore, it is our opinion that <br />improvement to Kerley Road is not warranted for the Carramore Subdivision project. <br />If additional informsfi n is heeded, please do not hesitato to call. <br />Sincerely yours,. <br />THE PRESCOTT CONVANr <br />Attachments (3) <br />Page 1 of 1 <br />21 <br />