AgdaPkt 2010-01-25 clsd and regular

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6.2A Page 35 travel lanes and on-street parking. Road closures would require drivers to detour to other, potentially less convenient routes to their destinations. Construction across most roadways would use the open-trench method, which requires excavation through the roadway. The severity of the impact of lane closures on traffic resulting from open-trench construction would vary by time of day, the number of available travel lanes, and whether existing traffic volume levels would be maintained during peak traffic flow periods. With the exception of residential streets, which have low daily and peak hour traffic volumes, the temporary elimination of one or more travel lanes during peak hours could result in LOS F conditions because traffic volume demand could substantially exceed the capacity of the roadways, causing a significant traffic impact. Those roadways that would be impacted by construction operations are identified in the Draft EIR, beginning on page 4.16-17. . Mitigation Measure TRN 1 a: Traffic Control Plan Measures . Mitigation Measure TRN Ib: Coordination of Traffic Control Plans for Project Segments Impact TRN-2: Pipeline construction would temporarily reduce capacity of the street system, which could have a temporary impact on transit operations where trenchless crossings are not used. Construction activities could disrupt the flow of public transit along the alignment and could slow bus movements. If full street closures are required, buses may need to be temporarily detoured and/or bus stops temporarily relocated. The use of trenchless construction methods on Mission Boulevard, Fremont Boulevard, Mowry Avenue, Cherry Street, Central A venue, Willow Road, EI Camino Real, and Woodside Road would avoid impacts from lane blockages or road closures on the AC Transit, VT A, and SamTrans bus routes on these roadways. Additionally, as part of SFPUC Standard Construction Measure No.5 (traffic-control plan), the SFPUC would require its construction contractor( s) to coordinate with local traffic and transit agencies to minimize disruption and to inform the public well in advance of transit stop or schedule changes. However> Project construction could still have a significant impact on transit where trenchless construction methods are not used. . Mitigation Measure TRN 1 a: Traffic Control Plan Measures Impact TRN-3: Project-generated haul-truck traffic could temporarily reduce the capacity of the street system. Construction traffic on roadways in the immediate vicinity of the Project site and along haul routes could result in short-term increases in traffic volumes. The addition of construction- vehicle traffic to the current roadway volumes, without increasing roadway capacity, could result in increased congestion and delays for vehicles, including public transit. The presence of construction trucks, with their slower speeds and larger turning radii, would temporarily reduce .. .... .~oa~~ay..,?~p.~c.i.tie~~. .T~~p9.rt\D'. J~~ .~l.<?~'l.r.~~~.. ~4.i.c:t.t..r.edu.()~Hr.9.~4~aY.l;.a.p~.~i.ty ,.(;9.:t.l1.4. .fu11h~r. H. ..increase .congestionand .delays forvehicles.usingtheHroadway:. Trucks hauling excavated materials to off site disposal facilities or delivering concrete and other materials would use a combination of regional highways (e.g., I 680, I 880, U.S. Highway 101, and I 280), major arterials (e.g., Mission Boulevard, Mowry A venue, Willow Road, and EI Camino Real), local arterials, and residential streets, depending on the location of the construction site. An analysis of the potential traffic impacts associated with vehicle trips generated by facility-specific construction begins on Draft EIR page 4.16-21. . Mitigation Measure TRN 1 a: Traffic Control Plan Measures . Mitigation Measure TRN Ib: Coordination of Traffic Control Plans for Project Segments 25