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ABOUT THE MAP. This map shows the current exterior levels of noise created by cars, trucks, or trains traveling along roadways and rail lines <br />.n the city. The City's noise and land use compatibility standards (see Table N-1) consider exterior levels above 65 decibels (dBA CNEL) to be <br />generally incompatible for residential and other noise -sensitive land uses. <br />Existing Noise Contours <br />— 70+ dBA CNEL <br />_ 65 dBA CNEL <br />60 dBA CNEL <br />Source: Pl nftks 2020 oeb: Published: 9/20/2020 <br />••• Railway Community Noise Equivalent Level (CNEL): The energy -average of the sound levels <br />during a 24-hour period, with 5 decibels (dB) added to the levels from 7:00 pm to 10:00 <br />pm and 10 dB added from 10:00 pm to 7:00 am. The decibels are measured in terms of <br />relatives loudness as perceived by the human ear, referred to as A -weighted decibels (dBA). <br />FIGURE N-1 <br />EXISTING NOISE CONTOURS <br />CITY OF SANTA ANA GENERAL PLAN Ei rr .�,,•• <br />