Agenda - Council - 02/27/2018 - Laserfiche WebLink

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BOLTON & MENK Real People, Real Solutions. the proper traffic levels. Conversion of TH 10 to a freeway is likely not considered in the base model, therefore we plan to run the 2040 model with a freeway in place to ensure forecasts for this project account for any potential shifts in travel patterns with an improved TH 10. Traffic forecasts for the assumed build year (2025) and subsequent 20-year forecast (2045) will be provided. The forecasting effort will be summarized in the Existing Conditions and Traffic Forecasting Technical Memorandum. 2.3 No Build Analysis Traffic operations along the corridor will be analyzed using VISSIM models for existing conditions. We will expand the Highway 10 model we have completed in our Anoka planning work which provides a significant savings for Ramsey. Base models will be developed for AM and PM peak hours using existing geometry and traffic control for years 2018 (existing), 2025 (assumed build year), and 2045 (20-year forecast). Measures of effectiveness from the modeling will include LOS, delay, and queuing and will be used as a basis for comparing alternatives. An existing safety analysis will be conducted along TH 10 at the main study intersections and as segments to identify any existing safety issues. We will determine critical rates and indices for the intersections and segments as a measure to determine the scale of issues. The existing analysis will be summarized in the Existing Conditions and Traffic Forecasting Technical Memorandum. 2.4 Alternative/Build Analysis Alternatives will be analyzed using Synchro/SimTraffic and VISSIM in the AM and PM peak periods. Alternatives will include changes to intersection design along TH 10, mainly focusing on the intersections with Ramsey Blvd and Sunfish Lake Blvd, but will also include any intersection modifications west of Armstrong Blvd at Alpine Drive or other minor roadway connections. Changes to access will also be taken into consideration as frontage roads are proposed. An initial screening of interchange types and other intersection alternatives will occur in Synch ro/SimTraffic or CAP-X to ensure the alternatives meet project goals and objectives prior to time -intensive modeling using VISSIM. Measures of effectiveness from the modeling will be used to understand how each alternative positively or negatively affects operations, including delay, LOS, travel times and queuing. For this project, we anticipate modeling up to three interchange types at both Ramsey Blvd and Sunfish Lake Blvd in VISSIM along with future no - build. Initial screening using Synch ro/SimTraffic is assumed to be up to five alternatives at both Ramsey Blvd and Sunfish Lake Blvd. Frontage road alterations and changes to intersection type and access west of Armstrong Blvd including Alpine Dr and Jarvis St will be incorporated into the overall models. Each alternative will also be analyzed using methodologies in the Highway Safety Manual to implement crash reduction factors based on various improvements. This analysis will provide a predictive measure of anticipated safety for use in comparing alternatives. The Future Conditions Technical Memorandum will be submitted summarizing the forecasting efforts and analysis of alternatives. 2.5 Benefit -Cost Analysis Historically available funding opportunities such as TIGER and the newer INFRA program at the federal level require a benefit -cost analysis as part of the application, leading to one of the measures project scoring is based on. The traffic modeling and cost estimating work proposed for this project will provide a majority of the base information needed as inputs for a benefit -cost analysis. Other information such as emissions totals, maintenance costs, etc. will be computed to supplement the overall reported benefits and costs. We will pull together all of this information into a benefit -cost template to generate