Effects of soil surface degradation and vehicle momentum on dust emissions and visibility reduction from unpaved roads

Unpaved roads are built on the basis of soil compaction. Therefore, operation vehicles these results in dust emissions. As number passing increases, surface gradually degrades under shearing caused by tires. This enhances emissions and reduces visibility, increasing health environmental related issues as well risk collisions. The present study was conducted to quantify effect degradation from several types travelling different soils assess evolution security risks vicinity unpaved roads. Three (a passenger car, a 4WD vehicle truck) have been run an experimental road covered four particles. Each test consisted driving one at given speed (30, 45 or 60 km.h−1) particles previously spread mass per unit area (200, 400 600 g.m−2). concentration resuspended measured roadside using Optical Particle Counter (OPC) while visibility reduction simultaneously recorded same location. show that PM10 emission factors increase linearly with momentum for without mud flaps. presence such appendices can reduce factor 7. Moreover, although not considered conventional models, state may be key regarding has also shown similar silt content result very factors. An model then developed, based clay Indeed, this geotechnical parameter is more relevant characterize fine propensity generate dust. correlated according power law truck tests. interesting finding work fact extended earthwork sites where problems require spraying water traffic lanes. Improving modeling mechanisms generating lift associated safety indeed essential efficient use construction sites.