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ABOUT THE MAP. This maps hows; the projected exterior levels of noise (based on buiIdout of the land use plan), created by cars, trucks, or <br />trainstravel ing along roadways and rail Ilnes in the city. The City's noise and land use compatibility standards (see Table N-1) consider exterior <br />levels above 65 decibels (dBA CNEL) to. be generally incompatible for residential and other noise -sensitive land uses. <br />G <br />a <br />COSTA MESA f� �� Or 01_�hIDas <br />Future Noise Contours <br />— 70+dBA CNEL ••..•.•.• Railway <br />_ 65dBA CNEL <br />r: 60 dBA CNEL <br />is ur .N.. CITY OF SANTA ANA GENERAL PLAN <br />%..; Plamwmas 2020 ears Nblish.d: 9/E= <br />Community Noise Equivalent Level (CNEU: 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 WK. <br />FIGURE N-2 <br />FUTURE NOISE CONTOURS <br />