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Ms. Rachel Juba <br />April 2, 2021 <br />Page 4 <br />assessment. Based on our understanding of the site, we do not expect there will be visual <br />impacts per the AUAR guidelines. This information will be used to complete the AUAR. <br />Task 9 — Evaluate Impact on Traffic <br />As part of this task, the traffic impact from the Development Concepts and other identified new <br />traffic generators will be evaluated and discussed. The traffic analysis will include development <br />of: a base traffic model using existing conditions, volumes and traffic control; traffic projections for <br />the proposed site and adjacent roadway system; a detailed traffic analysis of the adjacent <br />roadway system, and; required mitigation measures to accommodate the proposed development <br />scenarios. The following outlines the subtasks that will be completed: <br />A. Data Collection <br />WSB will conduct traffic counts at intersections adjacent to the study area. The data for <br />the AUAR will include turning movement counts and directional counts at key <br />intersections and roadway segments. We are assuming that turning movement counts <br />will be collected at 5 intersections in the project area. We will use video cameras for a <br />minimum of 48 hours at each intersection and data will be collected for the AM (6:00-9:00 <br />a.m.) and PM (3:30-6:30 p.m.) peak hours. New counts will be conducted at those <br />intersections where any existing counts that may be available are more than two years <br />old. In addition, 24-hour daily counts will be conducted at up to 7 key locations. <br />B. Traffic Generation/Distribution <br />Based on the Development Concepts, a traffic generation model will be prepared for the <br />anticipated land uses in the study area. The traffic distribution will be determined with <br />input from the City and Washington County. In addition, other possible development <br />areas will be evaluated to determine their potential traffic generation and impacts to the <br />transportation system. This information will be used to develop the traffic forecasts for the <br />entire study area. <br />C. Traffic Forecasts <br />Based on the existing traffic volume data collected, traffic generation from the proposed <br />Development Concepts, traffic generation from other adjacent developments, and any <br />other anticipated additional background traffic growth not associated with the study area, <br />traffic forecasts will be developed based on the accepted methods for the impacted <br />roadways in the study area. The forecasts will be for up to three Development Concepts <br />and will include turning movement forecasts for the key intersections. ADT forecasts will <br />be developed for project area. A Forecasting and Assumptions Memo will be submitted to <br />the City and County for acceptance prior to finalizing the forecasts and moving forward <br />with the analysis and evaluation. <br />D. Traffic Analysis <br />Traffic conditions will be analyzed based on the forecasted traffic volumes on the <br />impacted roadways for the three Development Concepts. An analysis will also be <br />completed for the existing conditions as a basis for understanding the impacts of the <br />proposed development. This analysis will use the base Synch ro/Si mTraffic network <br />created for the study and will include a capacity and Level of Service (LOS) Analysis at <br />each impacted intersection and for the roadway system. The analysis will also include <br />travel speeds for the impacted roadways and entire system, and a Queuing Analysis <br />which will help with planning and design for improvements at each intersection. <br />GA.Clients A11\Hugo\Proposa1s\2021 LaValle AUAR\LTR - RJuba - LaValle AUAR - 040221.docx <br />