@ Vanasse Hangen Brustlin, Inc.
» Traffic signal controller cabinet modifications to provide appropriate traffic
signal phasing for the new geometry at Main Street /West Pearl Street /East Pearl
Street intersection.
Traffic operational analysis shows levels of service to remain the same (LOS C) as the
existing condition for the AM and PM peak hours at the signalized intersection of
Main Street and East/West Pearl Street. This result is based upon a forecast
diversion of approximately 125 vehicles during peak hours. Table 6 summarizes the
traffic operational results compared to the existing condition at the signalized
intersection of Main Street and East/West Pearl Street.
Table 6 - Signalized Intersection Capacity Analysis Summary
2-Way Alternative
(Single Lane E/W
Approaches
Existing 1-Way Cone. Side Street and
(Excl. PED) Excl PED)
vic* Delay** LOS** vic Delay LOS
Main St. at East/West Pearl St AM — 0.50 21 Cc 0.60 28 Cc
PM 0.47 22 Cc 0.56 32 Cc
* Volume to Capacity Ratio.
“* Delay in seconds per vehicle.
“’ Level of Service.
Tt should be noted that the analysis presented in Table 6 includes concurrent side
street phasing and exclusive pedestrian phasing for the traffic signal. This would
need to be reviewed more closely if this alternative is progressed to verify that the
phasing will work from a geometric standpoint and that split phasing can be utilized.
Additionally, the unsignalized side streets where not reviewed in detail for the
consideration of this alternative. These intersections will all experience an increase in
delay as a result of the added conflict movements.
A variation on this alternative could also be considered where either East Pear] Street
only or West Pear! Street only is converted to two way operations.
@ 3.1.5 Factory/Temple Street and East/West Pearl Street
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Under the reverse 1-way Factory/Temple and East/West Pearl Street alternative, the
existing eastbound traffic movements along Factory Street and Temple Street and the
existing westbound traffic movements along East and West Pearl Street would be
reversed. Noted is that the existing Temple Street 2-way traffic flows from Main
Street to Spring Street would also be changed to 1-way westbound. This alternative
is illustrated in Figure 20.
Alternatives Evaluation
