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As shown,a very small percentage of internal trips are expected to be work related(13%during the a.m.peak hour and 11%during the p.m.peak hour).The majority of the non-work trips during the peak hour are expected to remain internal for such purposes as shopping,banking,childcare,school and meals. On the other hand, approximately 65%to 75%of all external trips are work related(34%of 52%during the p.m.peak hour, and 43% of 57%during the a.m.peak hour).Consequently, even though the model does not consider housing costs and income levels, it has already assigned a very large percentage of the residents to employment locations outside of the Mountain House community.Considering only peak-hour work trips in the model, 76-77%of work trips (during the a.m.peak hour,43%out of 56% [43%+ 13%]; during the p.m.peak hour, 34%out of 45% [34%+ 11%])have been assigned externally. A study conducted by the National Cooperative Highway Research Program(NCHRP)entitled Travel Characteristics at Large-Scale Suburban Activity Centers(NCHRP 1989)indicated that 24%of trips made within major suburban activity centers are work trips.The average percentage of residents that live and work within the major suburban activity center ranges from 21%to 37%.A commute survey conducted by the City of Pleasanton in August 2003 shows that approximately 29%of residents live and work in the city.Including applicable portions of adjacent cities of Dublin and Livermore that will likely use the local arterials to travel to Pleasanton instead of the freeway,the amount of internal work trips totals approximately 37%. The experience of Pleasanton shows that it is possible to enhance the jobs-housing balance in a suburban center. The major employment center in the City of Pleasanton is the Hacienda Business Park.There was much skepticism about its ability to attract employers for local residents when it started in the 1980s.The conventional wisdom at that time was that employment-based land uses would continue to be centered in the San Francisco- Oakland area.More than 20 years later,major employment centers in the suburbs such as the Hacienda Business Park in Pleasanton are able to attract employers and provide much needed employment for the residents in Pleasanton and adjacent cities(nearly 40%as discussed above).The amount of projected internalized trips for the Mountain House area is consistent with these observations. Like the present analysis,the traffic modeling and analysis performed for the MHMP did not account for affordability;therefore,housing affordability has no effect on either the 1994 or current model conclusions.Both the 1994 and current internal trip-capture rates have been based on sound and conventional modeling procedures, which assume that affordability does not affect the internal trip retention or traffic behavior, and that as long as the balance of jobs,housing, and other land uses is not changed,the intemal/extemal distribution of trips does not change.It is anticipated that the impacts associated with the full buildout of the current MHMP will not be different from those identified in the MHMP EIR. Adopted Measures to Reduce Trip Generation _ Both the MHMP EIR and the current analysis indicate that approximately 40%of the peak-hour trips would be internal to the project study area.Various measures have been adopted to decrease the external auto trips that constitute 60%of the peak-hour trips.Near-term implementation and adaptation of these measures to the developing Mountain House community will help reduce the traffic impacts described below for the link-level and intersection analyses by promoting and facilitating the use of non-auto modes of travel in the county. Transportation Demand Management and Transportation Monitoring Transportation Demand Management(TDM, also known as Mobility Management)is a general term for various strategies that increase transportation system efficiency. TDM treats mobility as a means to an end,rather than an end in itself,and so helps individuals and communities meet their transport needs in the most efficient way,which often reduces total vehicle traffic.TDM prioritizes travel based on the value and costs of each trip,giving higher- value trips and lower-cost modes priority over lower value,higher-cost travel,when doing so increases overall system efficiency. For example, a higher-value trip would be bicycling to work while a lower-value trip would be College Park at Mountain House Specific Plan III Draft EIR EDAW San Joaquin County 4.11-27 Transportation