75C - PH - BRISTOL EIR FROM WARNER TO ST. ANDREW

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Exclusive right -turn lanes were also recommended on approaches where right - turn volumes are anticipated to be extremely heavy. Exclusive right -turn lanes improve intersection operations by providing increased capacity as well as improving upon traffic flow. The additional capacity which the exclusive right - turn lane provides is augmented by the improved traffic flow which is acquired through the separation of through and right -turu vehicles into different lanes. - Exclusive right -turn lanes were recommended on all approaches of the Bristol ^ Street /17th Street intersection and the Bristol Street /First Street intersection. Exclusive right -turn lanes were also recommended on the east approach of the Bristol Street /Civic Center Drive intersection.Exclusive right -turn lanes allow for right turn movements to be made concurrent with the non - opposing left - turn movements on the cross street through the implementation of a right -turn overlap. The right - turn movements at the Bristol Street /First Street intersection were not, however, critical in the ICU calculations for the future Year 2006 with widening. Implementation of a right -turn overlap therefore does not improve upon the expected LOS or V/C ratio et this intersection. Right -tum overlaps also require the prohibition of the U -turn movement from the left lane. They do, however, enhance traffic signal operations through the more efficient use of signal green time. At intersections where right -turn overlaps were proposed, the ICU calculations reflect adjusted turning movement volumes. The right-turn volumes were reduced by the volume of non - opposing left-turn traffic. Right -turn overlaps also require the prohibition of the U -turn movement from the left-turn lane. Where the proposed right -turn movement was overlapped with a dual left -turn Jane, the left-turn traffic was assumed to split evenly between both lanes. The right-turn volume was therefore reduced by half the non - opposing left -turn volume. Right -turn overlaps are recommended on all approaches of the Bristol Street /17th Street intersection and on the north and west legs of the Bristol Street /Memory Lane intersection. At the Bristol Street /First Street intersection, the anticipated V/C ratio of 0.87 is slightly higher than the Citys desired V/C ratio of 0.85. This V/C ratio does, however, correspond to an acceptable LOS of "D ". A fourth - westbound through lane could provide additional capacity that would reduce the anticipated V/C ratio to 0.74 at this intersection. This additional lane would require 12 feet of additional right-of -way on the south side of 1st Street for a distance of approximately 420 feet on each side of Bristol Street. Due to the extensive additional right -of -way required and the anticipated acceptable IV -70 75C -205 w