Increase of train speeds induces increased levels of vibration and structural noise in residential areas. The railway track stability and the reducing of harmful vibration influence on the environment can be achieved by means of the rail base stiffness optimization. The experimental plots were laid with different types of under ballast mats. It is shown that the polyurethane ballast mats are 1.9 times more effective than two layers of geocomposite and 1.5 times more effective than the porous rubber mats. The advantage of this technical solution is the possibility of its implementation both on a separate local section and in conjunction with the track repair without reducing repairing speed.

vibration, stiffness, under ballast mat, geogrids