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I <br /> Four survey stations were set up: on T.H. 10 west of Waco Street,on T.H. 10 <br /> Ieast of Cleveland and Jarvis Streets, on T.H. 169 north of 225th Avenue and <br /> on T.H. 101 south of the Mississippi River bridge. Two people were placed <br /> I at each station, one to record license plates of inbound vehicles and one to <br /> record outbound license plates. The time that each vehicle passed the station <br /> was also recorded. Inbound vehicles were traced through the system. If the <br /> I same license plate showed up at an outbound station, the inbound and <br /> outbound times were checked to determine whether or not it appeared that the <br /> vehicle had made a stop in Elk River. In bound vehicles whose license plates <br /> I were not traced to an outbound station either exited the City via another route <br /> or were destined for a location in Elk River. Ideally,people would have been <br /> stationed on every road crossing the Elk River City limits. However,the cost <br /> I of collecting and reducing data would have been prohibitive. Therefore, <br /> assumptions were made about the percentage of E-E trips entering or <br /> departing the City on these other roads. <br /> I <br /> From the data collected and the assumptions made, the number of vehicles <br /> I passing by at each external zone was divided into E-E and E-I trips. E-E trips <br /> between the external zones that served as survey stations were allocated <br /> based on the actual survey data. Remaining E-E trips and E-I trips were <br /> I distributed to other external zones and TAZs, respectively, by percentages <br /> according to the "draw", or total trip generation within each zone. <br /> I The remaining TAZ trip ends after distribution of E-I trips were categorized <br /> and I-I. I-I trips were classified as either productions or attractions such that <br /> the total of productions from all TAZs was equal to the total of attractions. <br /> IAll residential trips generated were called productions, and each was <br /> assumed to be attracted to a commercial/industrial/ recreational generator. <br /> Remaining commercial/industrial/recreational trips were divided evenly <br /> between productions and attractions. <br /> I Trip distribution takes the form of a matrix, or a trip table. For Elk River, a <br /> trip table was created for each category of trip: E-E, E-I, and I-I. Tables 3A, <br /> 3B, and 3C are the trip tables for replication of the existing transportation <br /> Isystem; Tables 3D, 3E, and 3F are for the ultimate forecast. <br /> 3. Network Assignments <br /> IAfter trips are distributed they must be assigned travel paths on a network. <br /> A network is a series of links and modes, where links represent roadway <br /> Isegments and nodes represent either intersections or network loading points. <br /> Each link has a travel time, a function of its length and travel speed. Loading <br /> links are links used to place trips generated in TAZs onto the network. Each <br /> ITAZ may have one or several loading links. Trips are assigned to the <br /> network generally following the path of least travel time between the origin <br /> Iand destination zones. <br /> ICTP-230.156 -10 230-156-80 <br />