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Mr. Edward J. Callahan, Chair <br />Pages <br />April 9,1998 <br />i >* #w c — <br />A. <br />B. <br />a <br />Provide a median barrier at the location of the acceleration lane for traffic from east bound <br />County Road 6 merging with east bound new Highway 12 traffic. This is an important safety <br />feature on this two lane roadway to prevent east bound new Highway 12 traffic from <br />mistakenly moving into the west bound traffic lane when traffic is merging. <br />Median barrier is being incorporated into the design as requested. <br />Provide a free right turn at the intersection of County Road 6 and new Highway 12 for traffic <br />flowing from east bound County Road 6 to east bound new Highway 12. <br />Mn/DOT is investigating this change. Because the widening required for a free-right-tum- <br />lane will be largely on the County Road 6 bridge over the BNSF railroad, this free-right-tum- <br />lane may be cost prohibited. <br />Provide a free right turn and an acceleration lane for traffic coming off the loop from west <br />bound Highway 12 to go west on County Road 6. <br />D. Provide for proper alignment of all necessary lanes to serve all traffic movements at the^ <br />intersection of County Road 6 and Old Highway 12. <br />Given the close proximity of the intersection of the south ramps and County Road 6 an <br />acceleration lane is not advisable. Even without the requested fiee-right-tum and acceleration <br />lane, the operation of the north ramp intersection in the year 2015 is forecast at a Level-of- <br />Service B, which is quite high. <br />10. Independent Noise and Vibration Study <br />In recent neighborhood meetings, concern is escalating regarding the potential noise and vibration increase <br />that will result from a corridor that will include, not only car and truck traffic, but more, faster, heavier, <br />longer, and taller trains. Some citizens are already reporting intolerable increases in vibrations and noise, <br />due to increased train traffic. They, and we, arc wondering ifMNDOT truly has a handle on what will be <br />created in this new corridor. Therefore, we are strongly in favor of having independent studies made on <br />this issue. These studies should include a nationwide search for similar existing corridor configurations, <br />and tests conducted along these corridors to determine the actual sound and vibration impact on the <br />environme it and livability, as well as information regarding the most effective methods of mitigating the <br />noise and vibration impacts. <br />RESPONSE UNDER DEVELOPMENT <br />Sincerely, <br />Tom O’Keefe, P.E. <br />Preliminary Design Engineer