Noise Pre & Post M621 Junctions 6 to 7 Noise Barrier Installation

Highways England have completed an assessment of the impact on noise (measured in decibels/dB) of their noise barrier to see how successful its introduction has been. For context, a 3 dB difference is the equivalent of moving twice as far away from a noise source of before and a 6 dB difference results in a perceived noise reduction of approximately of a third. The two locations monitored with in Hunslet and Riverside Ward are detailed below.


Day


Location Before After Difference Distance

Sandon Mount 63 60 -3 50m

Clayton Drive 61 58 -3 25m


Night

Location Before After Difference Distance

Sandon Mount 58 52 -6 50m

Clayton Drive 56 56 -6 25m


Average Improvement


Location Difference

Sandon Mount -4.5

Clayton Drive -4.5


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