Major Roads

<figure style='width:708.25pt;'><figure><table style='background-color:rgb(255, 255, 255); border-collapse:collapse; color:rgb(76, 76, 76); font-family:&quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, Helvetica, Arial, sans-serif; font-size:15px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-transform:none; word-spacing:0px;' width='944' cellpadding='0' cellspacing='0' border='0'><tbody><tr><td style='border:1pt solid rgb(163, 163, 163); padding:4pt; width:134.2pt;' width='179'><p style='margin:1em 0px;'><span style='color:#000000;'><strong>Source</strong>&nbsp;</span></p></td><td style='border-bottom:1pt solid rgb(163, 163, 163); border-image:initial; border-left-style:none; border-right:1pt solid rgb(163, 163, 163); border-top:1pt solid rgb(163, 163, 163); padding:4pt; width:120.45pt;' width='161'><p style='margin:1em 0px;'><span style='color:#000000;'><strong>Lden</strong>&nbsp;</span></p></td><td style='border-bottom:1pt solid rgb(163, 163, 163); border-image:initial; border-left-style:none; border-right:1pt solid rgb(163, 163, 163); border-top:1pt solid rgb(163, 163, 163); padding:4pt; width:99.25pt;' width='132'><p style='margin:1em 0px;'><span style='color:#000000;'><strong>Lnight</strong>&nbsp;</span></p></td><td style='border-bottom:1pt solid rgb(163, 163, 163); border-image:initial; border-left-style:none; border-right:1pt solid rgb(163, 163, 163); border-top:1pt solid rgb(163, 163, 163); padding:4pt; width:106.3pt;' width='142'><p style='margin:1em 0px;'><span style='color:#000000;'><strong>Lday</strong>&nbsp;</span></p></td><td style='border-bottom:1pt solid rgb(163, 163, 163); border-image:initial; border-left-style:none; border-right:1pt solid rgb(163, 163, 163); border-top:1pt solid rgb(163, 163, 163); padding:4pt; width:106.3pt;' width='142'><p style='margin:1em 0px;'><span style='color:#000000;'><strong>Levening</strong>&nbsp;</span></p></td><td style='border-bottom:1pt solid rgb(163, 163, 163); border-image:initial; border-left-style:none; border-right:1pt solid rgb(163, 163, 163); border-top:1pt solid rgb(163, 163, 163); padding:4pt; width:5cm;' width='189'><p style='margin:1em 0px;'><span style='color:#000000;'><strong>LAeq,16hr</strong>&nbsp;</span></p></td></tr><tr><td style='border-bottom:1pt solid rgb(163, 163, 163); border-image:initial; border-left:1pt solid rgb(163, 163, 163); border-right:1pt solid rgb(163, 163, 163); border-top-style:none; padding:4pt; width:134.2pt;' width='179'><p style='margin:1em 0px;'><span style='color:#000000;'>Major Roads</span></p><p style='margin:1em 0px;'><span style='color:#000000;'>Those which have more than three million vehicle passages a year (for mapping rounds other than Round 1)</span></p></td><td style='border-bottom:1pt solid rgb(163, 163, 163); border-left-style:none; border-right:1pt solid rgb(163, 163, 163); border-top-style:none; padding:4pt; width:120.45pt;' width='161'><p style='margin:1em 0px;'><span style='color:#000000;'>The day-evening-night level indicator for overall annoyance, based upon annual average A-weighted long-term sound over 24 hours. It includes a 5 dB(A) penalty for evening noise (19:00-23:00) and a 10 dB(A) penalty for night-time noise (23:00-07:00)</span></p></td><td style='border-bottom:1pt solid rgb(163, 163, 163); border-left-style:none; border-right:1pt solid rgb(163, 163, 163); border-top-style:none; padding:4pt; width:99.25pt;' width='132'><p style='margin:1em 0px;'><span style='color:#000000;'>The night level indicator for sleep disturbance, based upon the A-weighted, Leq (equivalent sound level) determined over all the 8-hour night periods (23:00-07:00) of a year</span></p></td><td style='border-bottom:1pt solid rgb(163, 163, 163); border-left-style:none; border-right:1pt solid rgb(163, 163, 163); border-top-style:none; padding:4pt; width:106.3pt;' width='142'><p style='margin:1em 0px;'><span style='color:#000000;'>The day level, the A-weighted, Leq (equivalent sound level), determined over all the 12-hour day periods (07:00-19:00) of a year</span></p></td><td style='border-bottom:1pt solid rgb(163, 163, 163); border-left-style:none; border-right:1pt solid rgb(163, 163, 163); border-top-style:none; padding:4pt; width:106.3pt;' width='142'><p style='margin:1em 0px;'><span style='color:#000000;'>The evening level, the A-weighted, Leq (equivalent sound level) determined over all the 4-hour evening periods (19:00-23:00) of a year</span></p></td><td style='border-bottom:1pt solid rgb(163, 163, 163); border-left-style:none; border-right:1pt solid rgb(163, 163, 163); border-top-style:none; padding:4pt; width:5cm;' width='189'><p style='margin:1em 0px;'><span style='color:#000000;'>The equivalent continuous sound level in dB(A) that, over the period 07:00-23:00 hours, contains the same sound energy as the actual fluctuating sound that occurred in that period</span></p></td></tr></tbody></table></figure></figure><p><br />&nbsp;</p><div style='background-color:rgb(255, 255, 255); color:rgb(76, 76, 76); font-family:&quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, Helvetica, Arial, sans-serif; font-size:15px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'><span style='color:#000000; font-family:Aptos, sans-serif; font-size:11pt;'>The Common Noise Assessment Methods in Europe (CNOSSOS) methodology introduced a significant number of new data requirements and approaches to computing noise emissions to improve the quality of the maps.&nbsp; Thus round 4 noise mapping results should not be compared to previous rounds</span></div>

Tags: 4_, maps, noise, round
Organization: OpenDataNI