It is shown that quietening heavy vehicles brings an appreciable reduction of traffic noise for streams containing 20 percent or more heavy vehicles and is most effective for high flows. Conversely reducing light vehicle noise brings most benefit in low flow situations where there is less than 20 percent heavy lorries. For all traffic containing up to 40 percent heavy vehicles reducing the nois…
Trrl Lr 752 The measurements have been used to construct approximate vehicle noise levels and speed characteristics over the speed range 20-100 km/h for up to 6 vehicle categories, and used as input in the TRRL computer model of traffic noise. By varying the number of vehicle categories in the model it was found that the lest number of categories that could be used without causing a signific…
X Icsmfe - Proceedings Of The Tenth International Conference On Soil Mechanics And Foundation Engineering, Volume 2, pp. 397-402