Agenda - Council - 04/13/2021 - Laserfiche WebLink

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Riverstone South EAW January 2021 18. Transportation a. Describe traffic -related aspects of project construction and operation. Include: 1) existing and proposed additional parking spaces, 2) estimated total average daily traffic generated, 3) estimated maximum peak hour traffic generated and time of occurrence, 4) indicate source of trip generation rates used in the estimates, and 5) availability of transit and/or other alternative transportation modes. Spack Solutions completed a Traffic Impact Study and prepared a supplemental Technical Memorandum to estimate the trips generated by the proposed residential development and evaluate the potential need for transportation or roadway improvements. The Technical Memorandum and the complete Traffic Impact Study are included in Appendix G. Existing and Proposed Parking Spaces The project area does not include any parking stalls under existing conditions. The proposed 165 detached single-family homes and 78 detached townhomes will include off-street parking and garages to accommodate parking for the residential units. Estimated Traffic Generation Trip generation was estimated using the methodology outlined in the Institute of Transportation Engineers (ITE) Trip Generation Manual, 10th Edition. Spack Solutions used locally collected data to estimate trip generation for this project as it is more representative of the specific traffic patterns of the development area and presented similar trip generation results when compared to ITE. Traffic that will be generated by future development outside the project area was evaluated using a background growth rate of 2% per year, which was applied to the existing study roadways. This results in a 4% increase in traffic volumes on area roadways in the 2022 scenario and a 49% increase in traffic volumes for the 2040 scenario. This increase was applied to all intersection movements except those entering the proposed project, as trips entering the project were accounted for in the trip generation. As the project area is vacant under existing conditions, there are no existing trips to or from the development area and the existing trip generation is zero. The residential development is expected to generate a total of 1,912 estimated daily trips. A breakdown of the expected trip generation is shown in Table 9. Peak hour traffic generation was estimated at 140 trips during the existing AM peak hour and 186 trips during the PM peak hour under future conditions. The AM peak hour is estimated to occur between 7:00 and 8:00 AM, and the PM peak hour is estimated to occur between 4:00 and 5:00 PM. The Traffic Impact Study included in Appendix G provides a full description and analysis of the peak hour traffic and traffic recommendations. 30