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<br /> The City has stated, and our study of the project has a ~ ~ ~
<br /> reinforced, that the maintenance of traffic during ~ ~
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<br /> construction is very critical to the success of this project. ~ ~ j~~...
<br /> We have discussed previously in this proposal a potential ~
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<br /> strategy to minimize the duration of traffic interference, , R _ ~ ,
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<br /> this being the roll in structure alternative for the bridge ~ ~
<br /> superstructure, since the bridge can be manufactured onsite, ~ ~ ~ ~
<br /> while traffic is still in its existing pattern. Only when the
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<br /> new bridge is moved into its final location and during the ~ ° ' ~ `
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<br /> construction of the majority of the approach work is there a ~ ~ . ~ '~~~~'r^r , ,~1
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<br /> need to detour the traffic. We have included one ossible lan
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<br /> corres onds to this ro osed construction scheme. Please ~ IIII
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<br /> "'""'r~ shows utilizing the south side of Santa Ana ~g ' ~
<br /> Boulevard for a detour road, beginning from the [insert detour ~ ~ ' ~ ~ ~ ~ ,
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<br /> intersection with Santiago Street on the westerly limit of ,
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<br /> the project, then turning southerly, before running parallel a ~
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<br /> to Santa Ana Boulevard, finally meeting the existing street ~ ~r
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<br /> alignment and profile near the Fuller Street intersection. This ~ ~ ° ~P~
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<br /> detour road is proposed to be two lanes in each direction. ~ ~ ~ ~ ° ~ ~
<br /> Of course this reduction of the third lane in each direction
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<br /> for the detour road would require the need for further
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<br /> traffic studies to confirm the viability of this configuration ~
<br /> in terms of Level of Service (LOS) for both the road and the The RFP mentions the possible need for temporarily locating
<br /> intersections, and surrounding network of streets. The figure the railroad operations onto shoofly tracks. This would
<br /> shows the proposed first stage of the construction, during be necessary for all other strategies for constructing the
<br /> which the majority of the improvements can be completed, underpass bridge structure. We have included II°~~~°'~~~ and
<br /> with only the south side (eastbound traffic direction) of Santa this figure shows one possible plan for the alignment of the
<br /> Ana Boulevard, both at and near the west, and east, end shoofly tracks, this being easterly of the existing alignment,
<br /> tie-ins to the existing alignment and profile needing to be beginning just southerly ofthe I-5 crossing, turning easterly
<br /> constructed. The next stage would shift traffic to north side and then running parallel to the existing tracks until well
<br /> of the roadway, while completing the final work elements. southerly of the station, and then turning easterly to join
<br /> the existing track alignments. The RFPalso mentions
<br /> To evaluate the traffic impacts during construction, our the importance of the shoofly alignments to utilize the
<br /> approach will look at several alternatives for traffic flow station platforms.This alignment achieves that need, with
<br /> through the project site, and impacts to the surrounding passengers being able to access the westerly track from
<br /> street and freeway network, including: the existing platform, with a temporary, probably asphalt
<br /> The use of a reversible lane to address peak hour concrete, platform, which can be constructed for access to
<br /> traffic movements. A moveable barrier could be used the easterly track. An SCRRA Standard Pedestrian Crossing
<br /> to provide three westbound lanes in the morning, and would be required at both ends of the platform to cross the
<br /> three eastbound lanes in the evening. shoofly tracks for access to the easterly track.
<br /> Due to physical constraints at Fuller consideration ~ - r~,_ .
<br /> might begiven to aone-way couplet using Fruit Street ~
<br /> for eastbound traffic to Grand Avenue with westbound G ~ ~
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<br /> traffic onSanta Ana Boulevard. This couplet would be
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<br /> join together prior to Santiago Street.
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<br /> Close evaluation ofthe I-5 ramps for circulation will ~ ~~j;iill
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<br /> also be a key component. With advance notification,
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<br /> traffic utilizingthe Grand Avenue exits may instead ~ ~ ~ , ~
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<br /> use 17th Street and 4th Street with alternative routes, , ,
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<br /> further reducing the load on Santa Ana Boulevard
<br /> Burin construction. ~
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