06-27-1994 Council Packet - Laserfiche WebLink

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r 00-24*94 lb:0i i-A.V ol2 oiou 0.*\A A ».*.» - a.'A.\. BARTON'ASCHMAN ASSOCIATES, INC. 3.Mode Choice:Once the number of trips between each zone pair is determined, the proportion of trips using each mode i$ determined. Modes typically Include transit, auto driver, and auto passenger. Estimation of travel by mode allows us to determine the number of vehicle-trips. 4.Trip Assignment:Between each piir of zones, the vehicle*trips pre iously deteimined are assigned to one or more routings, or paths using available roadways. The selection of the paths is based on minimizing the travel time between the zones. Slower speeds resulting from traffic congestion is considered in this calculation. Socioeconomic Data The immediate task at hand is to assemble the necessary socioeconomic data for input to the trip generation step. Specifically, the basic data necessary includes population, households, retail employment and non-retail employment, by TAZ. We will begin by using data for 1994, and then proceed to use year 2015 forecasts. Because of the requirements of a detailed forecast of traffic in the TH 12 corridor, we will subdivide the regional TAZs into subzones. The smaller subzones will support a much more detailed roadw'ay network, allowing us to forecast traffic on many more roadways which would not otherwise be included in the regional model. Xote that the area described will be modeled in detail, but the entire regional model will still be used in executing the model. Outside the detailed area, the regular regional model level of detail will be used. Therefore, the influence of other regional roadway facilities will be taken into account. The subdivision has been defined geographically. A total of 29 regional TAZs have been subdivided into 164 subzones. The subdirided zones make up an area generally defined as follows: Eastern Boundary: 1-494 Northern Boimdary: Trunk Highway 55 Western Boundary: Hennepin County Line, extended south to CSAH 15 Southern Boundary: CSAH 15, Lake Minnetonka. McGinty Road ICSAH 16) Population and household totals for the subzones will be estimated using 1990 Census block information (subzone boundaries follow census block boundaries), to subdivide the regional TAZ totals. The division of TAZ employment information into the subzones will be based on field observation and census-defined land area. Socioeconomic totals for 1994 and forecasts for 2015 will be based on the Councils approved 1994 and 2015 TAZ forecasts for population, households, and emplo>Tr.ent. Figures 1 and 2 show the forecasts, by city, for population and households. Note that some portions of Orono lie outside the detailed area and therefore the totals underestimate Orono population and households. kro lj7624rr