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Commuter Rail Extension Alternatives Analysis - Transportation ...

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CALTRAIN EXTENSION TO MONTEREY COUNTYALTERNATIVES ANALYSISTable 8-24Emissions from Auto Access <strong>Commuter</strong> Vehicles (2030)VOC CO NO X PM 10 SO XEmission factor (grams/mile)—2014 0.094 2.438 0.303 0.013 0.003Daily emissions (pounds/day) at Pajaro location with total 0.98 25.38 3.15 0.13 0.03daily miles of 4,722Daily emissions (pounds/day) at Castroville location with 0.58 15.08 1.87 0.09 0.02total daily miles of 2,805Daily emissions (pounds/day) at Salinas location with total 1.82 47.45 5.90 0.26 0.05daily miles of 9,401Total (pounds/day) 3.38 87.91 10.92 0.48 0.10Total (tons/year) 0.43 11.21 1.39 0.06 0.01Emissions Credit from <strong>Commuter</strong> VehiclesOnce the proposed project starts in 2010, the commuters in the neighborhood of Pajaro, Castroville,and Salinas will have the option to travel by train or express bus to the Santa Clara, San Mateo, andSan Francisco areas to work. Therefore, the VMT would be greatly reduced. The reduction of VMT asa result of using train or bus to commute instead of driving was estimated for year 2010 and 2030.The annual reductions of VMT for 2010 and 2030 are 31.56 million and 60.54 million miles,respectively. The reduced VMT were multiplied by emission factors as derived from EMFAC2002model to calculate the reduction of emissions in tons per year. Table 8-25 presents the results ofemission rate reductions.Table 8-25Emissions Reduction (Credit) from <strong>Commuter</strong> VehiclesYear 2010VOC CO NO X PM 10 SO XEmission factor (grams/mile) 0.132 3.330 0.457 0.010 0.003Total annual emission reduction (tons/year) due to VMT reduction of 4.59 115.86 15.90 0.35 0.1031,562,557 milesYear 2030Emission factor (grams/mile) 0.073 2.108 0.283 0.010 0.003Total annual emission reduction (tons/year) due to VMT reduction of 4.87 140.68 18.89 0.67 0.2060,542,349 milesTotal Operational Net Increase of Project EmissionsThe total operational net increase of the Caltrain <strong>Extension</strong> or Express Bus alternative emissions arecalculated by adding the train/express bus operational emissions to the home to station commuteremissions and then subtracting the commuter emissions credit as a result of commuters taking thetrain or express bus instead of driving to work. Tables 8-26 and 8-27 present the calculated resultswhich show the operational total net increase (decrease) of air pollutants.parsons CHAPTER 8: EVALUATION OF ALTERNATIVES 193

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