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MITIGATION RECOMMENDATIONS <br /> In the paragraphs that follow, several mitigations will be recommended to help to <br /> improve the traffic condition for the future cumulative development scenario. Two <br /> more tables have been prepared which show the resulting V/C ratios and <br /> corresponding levels of service when the recommended mitigation measures are <br /> implemented. The recommended mitigation measures are defined in detail following <br /> Table VIII and Table IX. Reference is made to Table VIII which summarizes the traffic <br /> impacts with mitigations for the cumulative traffic other than the project. <br /> TABLE V111 <br /> LEVEL OF SERVICE SUMMARY <br /> FOR CUMULATIVE TRAFFIC <br /> (MITIGATED) <br /> NORTH/SOUTH ST EAST[WEST ST VAC LO <br /> Airport Way Arch Airport Road 0.99 E <br /> East Frontage Road Arch Road 0.90 D <br /> Hwy 99 NB Off Arch Road 0.84 D <br /> Hwy 99 SB Off Arch Road 1.28 F <br /> West Frontage Road Arch Road 0.94 E <br /> West Frontage Road Project Access N/A <br /> Source: TJKM <br /> February 1988 <br /> All locations would have very heavy traffic volumes, and one location, the intersection <br /> of Arch Road and the future State Route 99 southbound off-ramp would be in the <br /> failure mode, even with extensive widening and lane geometric mitigations. The only <br /> way to mitigate this problem is to reduce the density of the future development, or to <br /> provide more roadways in the area for the traffic to use. <br /> If there were another major east/west facility constructed parallel to about a mile <br /> north of Arch Airport Road, that could have full access to the State Route 99 freeway <br /> via a newly constructed interchange, then the traffic volumes along Arch Road would <br /> drop significantly, and the level of service would be satisfactory. <br /> It is very important to note here, however, that mitigations to the surface street <br /> system will have little effect on circulation improvement if the freeway system fails. <br /> The State Route 99 freeway will need to be widened from an existing four lane facility <br /> to an eight lane facility by the year 2000 in order to handle the anticipated cumulative <br /> traffic volumes. If this major improvement is not done, then the entire street system in <br /> 15 <br />