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<br />
<br />Kimley-Horn
<br />and Associates, Inc.
<br />
<br />Mr, Jorge Vera, April 25. 2011, Page 4
<br />
<br />Table 1 provides a summary of the existing and future intersection and approach
<br />delay (in seconds), level of service, and maximum volume-to-capacity ratio for
<br />the AM and PM peak periods for both the weekday and Saturday. The City is
<br />considering converting the existing eastbound approach, which consists of a
<br />shared left-through and an exclusive right-turn lane into, to an exclusive left turn
<br />lane and a shared left-through-right turn lane. The change in geometry will
<br />require the eastbound and westbound approaches to operate as split phased. The
<br />existing cycle lengths and northbound / southbound splits were not changed. The
<br />future conditions analysis reflects the proposed geometry and phasing changes.
<br />
<br /> TABLE 1
<br /> COLLINS AVENUE AT 183RD STREET
<br /> INTERSECTION CAPACITY ANAL YSIS SUMMARY
<br /> Exlstlnll Conditions Future Conditions
<br />Analysis Period Intersection Intersection V/C Intersection Intersection V/C
<br />Auuroach Delav (secl LOS Ratio Delav (secl LOS Ratio
<br />Weekday AM Peak Hour 18.4 B 0.67 17.7 B 0.62
<br />Eastbound Approach 57.8 E O,B8 54,3 D 0,79
<br />Westbound App,oach 36.3 D 0,01 60.3 E 0,10
<br />No'thbound App,oach 11.8 B 0.62 11.5 B 0.61
<br />Southbound App,oach 15,2 B 0,62 15,0 B 0,62
<br />Weekday PM Peak Hour 20.6 C 0.87 19.7 B 0.73
<br />Eastbound Approach 79.9 E 0,92 70.3 E 0,78
<br />Westbound App,oach 49,8 D 0.01 77,9 E 0,19
<br />No,thbound App,oach 16.5 B 0.88 14,8 B 0,75
<br />Southbound Approach 15.3 B 0,65 16.4 B 0.67
<br />Saturday AM Peak Hour 13.6 B 058 13.3 B 0.S2
<br />Eastbound Approach 54.1 0 0.78 55.5 E 0,72
<br />Westbound Approach 40.5 D 0,02 64.2 E 0,29
<br />No,thbound Approach 8,8 A 0.51 8,5 A 0,51
<br />Southbound Approach 11.2 8 0,51 10,8 8 0,52
<br />Saturday PM Peak Hour 15.6 B 0.68 15.9 B 0.66
<br />Eastbound Approach 53.6 D 0,79 55.9 E 0.76
<br />Westbound Approach 40.0 D 0.01 61.9 E 0,19
<br />Northbound Approach 11.6 B 0,67 11,7 B 0,67
<br />Southbound App,oach 13,2 B 0.59 13.2 B 0.59
<br />
<br />Note: The future conditions analysis reflects the proposed geometry ond phasing changes.
<br />
<br />Based on the intersection capacity analysis summarized in Table 1, the
<br />intersection is expected to operate at an acceptable level of service for both
<br />existing conditions and future conditions. For all analysis periods, the
<br />intersection is expected to operate at the existing level of service with the
<br />modification to the driveway on 183'd Street.
<br />
<br />Summary
<br />
<br />Based on the analysis, the intersection of Collins Avenue and 183'd Street will
<br />operate at the existing level of service, or better, with the driveway modification
<br />on 183'd Street. The geometry changes for the eastbound approach at Collins
<br />Avenue and 183'd Street will require a four section signal head for the inside lane.
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