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Kristine Giga, P.E. City of Arden Hills April 6, 2011 Page 9 Using the future Arden View Drive and Royal Hills Drive intersection as one end point and the Hamline Avenue and Colleen Avenue intersection as another, travel time runs were completed between the two points to determine if one route was quicker than the other. The roadways associated with the two routes include: 1) Arden View Drive, Arden View Court, and Hamline Avenue 2) Royal Hills Drive, Snelling Avenue, McClung Drive, Colleen Avenue, and Hamline Avenue Results of the travel time comparison (shown in Figure 6) indicate that the difference between the two routes is negligible. Based on this information, the amount of development traffic that originates or is destined for Hamline Avenue (south of the development) is not expected to take one of the two routes more than the other. Therefore, the increase in traffic volume due to the proposed development along Colleen Avenue and Arden View Drive will be similar. Taking into account the expected trip generation and directional distribution, these roadways will see an increase of approximately 75 vehicles per day (vpd) respectively. This increase assumes Alternative 1 conditions, which represents a worst-case scenario for impacts to these roadways. To determine the increase in traffic volumes along Keithson Drive due to the potential roadway connection (Alternative 2), the location of the driveways within the proposed development were reviewed. These driveways were reviewed to determine the most likely route that vehicles will use to enter /exit the neighborhood. Based on this analysis, Keithson Drive will see an increase of approximately 75 to 100 vpd. It should be noted that approximately 75 vpd correlates to approximately 5 to 10 vehicles during the peak hours. The combination of background traffic and trips generated by the proposed development for year 2013 Alternative 1 and 2 build conditions are shown in Figure 7 and 8, respectively. YEAR 2013 ALTERNATIVE 1 BUILD CONDITIONS To determine how well the existing roadway network will operate under year 2013 Alternative 1 build conditions, an operations analysis was completed for the a.m. and p.m. peak hours. Results of the year 2013 Alternative 1 build operations analysis shown in Table 3 indicate all key intersections will continue to operate at an acceptable overall LOS A during the a.m. and p.m. peak hours with the existing geometric layout and traffic control. All side - street approaches will continue to operate at LOS D or better during the a.m. and p.m. peak hours, with minimal impacts to the side - street delays. No queuing issues are expected. Table 3 Year 2013 Peak Hour Capacity Analysis — Alternative 1 Level of Service Results Intersection Level of Service and Delays A.M. Peak Hour P.M. Peak Hour LOS Delays LOS Delays County Road 96 and Snelling Avenue* A/C 20 sec. A/D 30 sec. County Road 96 and Keithson Drive* A/B 15 sec. A/C 20 sec. Snelling Avenue and Royal Hills Drive* A/B 10 sec. A/B 10 sec. Hamline Avenue and Arden View Court* A/D 30 sec. A/B 15 sec. * Indicates an unsignalized intersection with side- street stop control. The overall LOS is shown followed by the worst approach LOS.