Effective vibration protection of operating subway lines could have been implemented until recently only on condition of traffic stop for months, concrete removing and new path base creating for 'mass-spring' device type. In the new technology implements unique rail fastening Cradle-2, highly effective at vibro protection and adapted for installation onto existing wooden sleepers in places of conventional rail fastenings.

For this purpose there is a special fastening structure installation position in which its vertical clearance and, what is more important, stiffness are similar to size and stiffness of conventional rail fasteners.

After the replacement of fastenings the entire protected section of track during one "night window" springs are installed into Cradle-2 fasteners and track becomes vibro protected.