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5. Environmental Analysis <br />No[sE <br />Vehicular Mobile Sources <br />Norse from motor vehicles is generated by engine vibrations, the interaction between tires and the road and <br />the exhaust system. Reducing the vehicle speed reduces the noise exposure of receptors adjacent to the <br />road. Each reduction of five mile per hour reduces noise 1 <br />� b about 1.8 c�BA, Traffic noise levels were <br />calculated for historical operating conditions when the Fairhaven /Lincoln intersection was open in 2005 and <br />2006 and for existing conditions when the intersection was closed in p <br />07. Noise modeling was performed <br />using the FHWA's Traffic Noise Model. Average dailY traffic volumes were provided by the traffic stud <br />(D 1J M Harris, March 2008). Mode Iing is based on noise levels at 10 feet from the edge of the nearest traffic <br />lane (excludes noise from train traffic). Table .2 ;4 lists the average daily traffic ADT noise levels on <br />roadways in the vicinity of the project with the intersection open and Table 5.2-5 lists the ADT noise levels <br />with the intersection closed. with the intersection open noise levels adjacent to the roadway range from 68 to <br />78 dBA CN EL. Noise attenuation provided by intervening 9 mason r walls at the adjacent residences ranges <br />from 5 to 8 dBA depending on whether or not the walls have gaps, which would reduce their noise reduction <br />effectiveness FHIIA 2006). <br />Table 5.24 <br />Traffic Noise odellr <br />Fairhaven lUncoln Open) <br />Location <br />ADS' <br />CNEL AAJ <br />Lincoln Avenue <br />Fairhaven Avenue to East Santa Clara Avenue <br />5,000 <br />58.9 <br />East Santa Clara Avenue to 17th Street <br />0,350 <br />09.3 <br />East Santa Clara Avenue <br />East of Lincoln Avenue <br />0,350 <br />65.4 <br />Fairhaven Avenue <br />East of Lincoln Avenue <br />6,800 <br />00,E <br />7th Street :.. <br />Between Lincoln Avenue and Grand Avenue <br />57P700 <br />77.7 <br />Grand Avenue <br />Fairhaven Avenue to East Santa Clara Avenue <br />24,800 <br />76.2 <br />East Santa Clara Avenue to 17th Street <br />24,150 <br />76.1-- <br />Source: FH A, Traffic Noise Model, Version 2.5. Based on traffic volumes and speed limits obtained from the traffic analysis prepared by DMJM <br />Harms (March 2008 ). Modeling is based on noise levels at 10 feet from the edge of the nearest traffic lane (excludes noise from train traff ie ). <br />ADT = average dail y trips <br />PE <br />FairhavenlLincoln and Santa ClaralLincoln In rs c on Io i� horns City of 'ray Ana *Page 5.2-5 <br />L. <br />upplewnt to the Beata Ana Second Haan Track Project EIR Resolution No. 2009 -034 <br />Page 71 of 130 <br />