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103 for trips from office. To achieve the maximum for inter- total internal trips be reduced to 100%, and the inter- nal trips to office, office square footage needs to be 4/2 changes from the affected land use to other interacting times the retail square footage, which would not maxi- land uses be proportionally reduced. This would not mize trips in the opposite direction. To maximize trips yield a total internal capture of 100 percent; rather, it from restaurant to office, the office would have to have would be one interchange and one direction that would 41 /3 times the square footage--again, different from what be estimated to be 100%. would be required for the opposite direction to maxi- mize. Following the same process, one can quickly see Validation of Estimation Procedure that it is mathematically impossible to achieve all uncon- strained internal capture percentages concurrently for a This estimation procedure was tested against development given MXD. In the unlikely occurrence that the sum of and cordon count data for several developments and found internal trips should total over 100% of the total trip to replicate actual results for MXDs fairly well. The validation generation for a land use, it is recommended that the procedure and results are described in Appendix F.