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<br />Proposals for Revising Northern California Metroplex – Alameda County/Contra Costa County 16 <br />This routing allows aircraft to join established arrival routes from a high altitude (>10,000 feet) over <br />areas with low population density and utilize a quiet, fuel efficient reduced power descent into <br />Oakland Airport. Joining established arrival routing eliminates a new RNAV arrival having to be <br />developed and implemented. It increases safety for SFO and OAK departures, due to reduced <br />potential conflict with OAK arrivals. Another advantage is that it frees airspace so that SFO and <br />OAK departures can eventually adopt quieter and more fuel efficient continuous climbing <br />procedures. <br /> <br /> <br />Figure 8: Preferred alternative to current WNDSR TWO overlaying 2012 USA Population Density Map (ESRI, <br />ArcGIS, https://www.arcgis.com/home/item.html?id=302d4e6025ef41fa8d3525b7fc31963a, accessed December <br />18, 2016.). The darker the color is, the denser the population. Shaded area indicates a generalized flight path <br />corridor the proposed route could be established within to eventually join the established OAK arrivals for <br />illustration purposes only. It is anticipated research would likely modify and identify appropriate adjustments to <br />the final track to avoid population and better achieve flight track efficiency and quiet descent procedure. <br /> <br /> <br /> <br /> <br /> <br />208