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<br />Page 24 <br /> <br />The change in traffic volumes between May 2015 and May 2016 suggest that there has been some <br />growth in traffic to and from the I‐280 corridor in Redwood City. As shown previously with the volumes <br />along I-280, there has been an increase in volumes in the area, not necessarily due to the changes on <br />Farm Hill Boulevard. <br />OBJECTIVE 8: <br />Ensure that the project does not create air quality impacts. <br />Why: Increased stopping and starting by vehicles can increase vehicle emissions and negatively impact <br />air quality. <br /> <br />Measurement: Air quality changes were estimated by modeling vehicle emissions at the controlled <br />intersections within the project limits. Data on traffic volumes, lane configurations, and signal timing <br />before construction and after the pilot were input into Synchro, a traffic analysis and modeling software <br />program. Emissions estimates are standard measures of effectiveness “MOE”s reported by the <br />program. The morning peak hour was picked for the analysis because the volumes are highest in the <br />morning for the corridor and it will result in a more conservative estimate of the air quality changes. <br /> <br />Outcome: The change in emissions during the morning peak hour (8 AM to 9 AM) is shown below in <br />Table 22 for carbon monoxide (CO), Table 23 for nitrous oxides (NOX) and Table 24 for volatile organic <br />compounds (VOC). Emerald Hill Road had no changes in estimated emissions, while the other <br />intersections experienced increases. The volume of emissions as a whole is very small, and does not <br />exceed the Bay Area Air Quality Management District (BAAQMD) thresholds of significant impacts for <br />air quality. These thresholds are shown in Table 25. <br /> <br />Table 22: Change in CO Emissions (kg) in AM Peak Hour <br />Intersection Pre-Pilot Post Pilot Absolute <br />Change <br />Percent <br />Change <br />Farm Hill Blvd/ Emerald Hill Road 2.69 2.69 0.00 0% <br />Farm Hill Blvd/ Glennan Drive 1.67 1.92 0.25 15% <br />Farm Hill Blvd/ McGarvey Avenue 1.65 2.47 0.82 50% <br />Farm Hill Blvd/ Jefferson Avenue 2.03 2.99 0.96 47% <br /> <br /> <br />8.A. - Page 35