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Attachment D4 <br />����f�� � � ��������'��, I�i� <br />TRANSPORTATION ENGINEERS AND PLANNERS <br />10417 EXCELSIOR BOULEVARD, SUITE TWO I HOPKINS, MN 55343 I(952� 238-16671 FAX (952) 238-1671 <br />June 24,2005 <br />�'� ��+Jl''i�� �} �:�J*'� <br />TO: <br />FROM <br />I' � <br />Refer to File: OS-44 <br />, ���] <br />I �{ '• �l LI� � I I I{ � <br />G �J � <br />I? . �VJV �+ f f V4r,A <br />Steve Thatcher � ��Y� <br />Jim Benshoo <br />� � <br />Supplemental Ztezns Regarding Giles — Dakota Acres Development in City of <br />New Market <br />This note is to respond to two questions you raised in our meeting today regarding the <br />Giles — Dakota Acres development. The questions and our responses are as follows: <br />1. What are the standar�ds fo� corner radii at intersections of collector roadways? <br />The Institute of TransportationEng,�ee�s recommends the followi�� three corner <br />radii at different types of street �tersec�ions: <br />. 20 feet at intersections of two local streets <br />. 25 feet at intersections of a local street with a collector street <br />. 30 feet at intersections of a collector street with a"major" street <br />To supplement these published guidelines, I would offer our experience on a <br />recent proj ect for the City of �Top�s. We examined one particular intersection <br />regarding its ability to accommodate right [��n maneuvers by school buses. We <br />found that the existing 15 foot radius was insufficient and needed to be increased <br />to 30 feet to adequately accommodate right turn maneuvers by the school buses. <br />2. Could we provide copie.s ��f ���� �T�°� .r�liar� charts we applied toproj ect the <br />future daily volume on �S'�r��c �r: �� 3kata Acres development? For each of <br />the three different land ti�s�.5 �er4� � Sireet A, the corresponding trip generation <br />chart published by the �tiE�� ��syc�r.�.ion Engineers in "Trip Generation, <br />7" Edition," 2003, is enclos� Tt� ��� : w-ou in projecting the future trai�c <br />volume on Street A, we �nti p3ie�i �1�� � rt�ge �ate or� each c�art time� tT�B :�;z�. a�' <br />the corresponding develor�i-,ient carttpor�e,�i located along Street �, <br />Let me know if you have any questions about the items addressed in this memo. <br />