Agenda - Council - 05/24/2005 - Laserfiche WebLink

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Traffic Operations Analysis Anaiysis was completed fbr the 2005 and 2007 baseline scenarios for both the A,M. and P.M. peak hours. Analysis was also completed tbr all the Btfild and Full Build scenarios. The analysis was performed using the methodology of the 2000 Highway Capacity Manual tlu'ough SYNCHRO, a traffic analysis.softwm'e program by Tmfficware. Results of the analysis are displayed as measures of effectiveness.' Measures of effectiveness display quantitative inibrmation about the peffom'tance of an intersection or network of intersections.. The primary measures that we used in this study are-level of service and volume to capacity ratios. Level of Service The operationai analysis results are described as a Level of Service~(LOS).ranging from A to F and these letters se~,e to describe a ~,'m~ge of operating conditibr/~ tbr different types of facilities. Levels of Service are cakulated tsased on the 2000 k[ighway Cqpacity Manual, which defines the level of service, based on control delay. Control delay is the delay expericncud by vehicles slowing down ilar a signal or stop sign, the wait time at the signal or stop sign, and the time [br the vehicle to speed up and get through the signal or enter into the traffic stream. The average in/et~ection control delay is a volume weighted average ofal'l delay ti'om' all intersection approaches for signalized intersections. Level of Service D is commonly taken as m~ acceptable design year LOS. The level of service and its ~sociated intersection delay for a signalized and unsignalized intersection is presented below. The delay tbr unsignalized intersections is lower for each LOS compared to signalized intersections accounts for the fact that people expect at .higher level of service when at a stop-controlled intersection. Rdated [,OS to Control Delay: LOS A Signalized Intersection Cqntrq.l Delay per Vehicle (sec.) <10 Unsignalized InterseCtion Control Delay per Vehicle (see.) ... _< 1.0 B >10 and ~ 20 >10 and < I5 C >20 and_< 35, >15 and _<25 'D >35 and < 55 >25. and _< 35 E >55 and <_ 80 >35 and _<. 50 F >80 >50 Volume to Capacity. Ratios Volmne to capacity ratio is the proportion of the ammfl traffic utilizing the facility to the k'acility's physical ability to carry a specific maximum volume. This [s calculated by- dividing thc total traffic using the f5cility'by the capaci~ 0fthe facility. This can then determine ifa 5qcility is suflqcient to handle the ual:ftc that ia expected to be t~'aveting on it. A ratio greater than 1.00 predicts that the facility, will be unable to discharge all of the Puhe Homes Deve/o£meJ~! ~,'d ;'Y 7'rq[/ic [mp,.tct 57udy "':," (-_'ily qf R~mv.~'ey, ,-'lnoka Counly, iWinnexota poge 75 of 24 · Prepared by: Bolton & Menk, /nc -455-