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IDave Sargent <br /> February 27, 2012 <br /> Page 2 <br /> Based on results <br /> 3 951REFT <br /> of numerous <br /> studies', <br /> roundabouts can "° KII •" R- <br /> rv4 9 �a•in� 6 ¢t- <br /> provide <br /> substantial traffic R12 <br /> H g is yKk kms,r�a Wk <br /> flow benefits « ' <br /> k� ,uer neer <br /> compared with ..r N NSrRLEr W ,n W. -n <br /> conventional „ m 4 2509�K <br /> intersections. <br /> �r <br /> They bring <br /> conflicting traffic 5 <br /> streams into a <br /> - <br /> steady flow and Proposed 96' right-of-way Tentative Map <br /> allow vehicles to <br /> safely merge without the stop-and-go conditions caused by stop signs and traffic signals.And by <br /> eliminating left turns, roundabouts eliminate delays caused by left-turning vehicles waiting for safe <br /> gaps in oncoming traffic. <br /> Evaluations of intersections converted to roundabouts from stop signs and traffic signals have <br /> reported significant reductions in vehicle delay and traffic congestion. Roundabouts also can <br /> provide considerable safety benefits.An evaluation of motor vehicle crashes following the <br /> conversion of 23 intersections to roundabouts from either stop signs or traffic signals found that i <br /> crashes of all severities were reduced by 40 percent and injury crashes were reduced by 80 percent <br /> (Persaud et al., 2001). <br /> In summary, it is concluded that the proposed roadway is in substantial conformance with the 2008 <br /> Town Center Initial Study. <br /> We appreciate the opportunity to provide these services for you. If there are any questions about <br /> this proposal, do not hesitate to contact me at (925) 463-0611 or email at cthnay@tjkm.com. <br /> Very truly yours, <br /> Christopher Thnay, PE, AICP <br /> Senior Associate <br /> J.VURISDICTIOMS\Son Joaquin County\094071 Town Center ROW\Repon\Feb 1012\2 Town Center Main St 022712.dou <br /> J <br /> Roundabout vs. Signals, When, Where&How to Deride What's Best Ben Jetta L Johnson,AL,August 21,2008 <br />