2007-11-28 CC Packet - Laserfiche WebLink

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Response: The traffic analyses used dual left turn lanes, one through lane, and one right turn lane for the southbound approach of 20th Avenue at Main Street (CSAH 14). This is the geometry that should have been shown in Figures 12 and 13 of the traffic study. These figures will be updated. 12. Comment Summary: In regard to operations and capacity impacts for the proposed development, 65 percent of the traffic was routed through the 1- 35E/CSAH 14 interchange. Since these intersections seem to be significantly impacted by the proposed development, analysis of the intersection operations at the interchange intersections should be considered. Response: The proposed development is expected to generate approximately 3,690 new vehicle trips on the roadway system over an average day. Of those, 65 percent or about 2,400 are on Main Street (CSAH 14) east of the intersection with 20th Avenue. Using an assumption of 15 percent to the north, 15 percent to the east, and 70 percent to the south at the interchange with 1-35E would result in 360 trips, 360 trips, and 1,680 daily trips, respectively. These volumes represent less than four percent of the existing traffic on 1-35E in either direction and on Main Street (CSAH 14) to the east of the interchange. The expected increases during the a.m. and p.m. peak hours are anticipated to be similar in magnitude. The County has a preferred alternative selected for the '-35E interchange with Main Street (CSAH 14), which includes improvements at the intersections. Construction is scheduled for 2009 based upon the Five-Year Highway Improvement Plan. The planned improvements should be able to accommodate projected traffic through 2030. The expected traffic from this proposed development does not represent a significant increase in traffic volumes that would necessitate changes to those planned improvements. 13. Comment Summary: It does not analyze impacts on the regional system by addressing connections between CSAH 14 (an" A" minor Arterial) and 1-35E and 1-35W. While the EAW includes a traffic analysis of local road impacts, it does not address potential regional transportation system impacts. Response: Main Street (CSAH 14) does not currently connect to 1-35W. About 2,400 vehicle trips per day are expected on Main Street (CSAH 14) east of the intersection with 20th Avenue. Using an assumption of 15 percent to the north, 15 percent to the east, and 70 percent to the south at the interchange with 1-35E would result in 360 trips, 360 trips, and 1,680 daily trips, respectively. These volumes represent less than four percent of the existing daily traffic on 1-35E in either direction and on Main Street (CSAH 14) to the east of the interchange. The expected increases during the a.m. and p.m. peak hours are anticipated to be similar in magnitude. The County has a preferred alternative selected for the 1-35E interchange with Main Street (CSAH 14), which includes improvements at the intersections. Construction is scheduled for 2009 based upon the Five-Year Highway Improvement Plan. The planned improvements should be able to accommodate projected traffic through 2030. The expected traffic from this proposed development does not represent a significant increase in traffic volumes that would necessitate changes to those planned improvements. Given the lack of connection to 1-35W, the minor increase in traffic on 1-35E, and the pending reconstruction of the 1-35E interchange with Main Street (CSAH 14), it was determined that the proposed development will have little to no impact on the regional system. Centerville Downtown Redevelopment Page 12