The roads with the most dramatic reductions in road surface sediment are those with no surfacing material or those surfaced with aggregates that produce a high degree of fine material during hauling operations. CTI is a commercially available electromechanical device that allows the driver to change tire pressures while the vehicle is in motion. Tire pressures were lowered from highway pressures of 90 psi to 30 psi in the drive tires while empty, and 50 psi in the drive and trailer tires when fully loaded. Speeds were less than 35 mph. The expected reductions in road surface sediment will vary depending upon the site conditions such as precipitation, composition of the road surface, traffic levels, and other factors.
Additional research is planned.