HAS is designed to reach high performances in terms of attenuation of ground-borne noise and vibration generated by the wheel/rail interface. It can be installed in sections of an urban lines requiring special care with regard to noise and vibrations disturbance as an alternative to floating slab tracks.
A quiet track for London
HAS is currently under installation on the Crossrail project, in London (UK), with around 5,000 HAS sleepers being laid in sensitive areas (representing approximately 3,000 single track linear metres). The line, crossing London East to West, will enter in revenue service in 2018 under the name of “Elizabeth line”.
Seamless track construction
HAS can be installed along with traditional sleepered tracks at the same construction rate and with the same equipment and workforce. On average, sleepered tracks allow construction rates 5 to 10 times higher than floating slab tracks on bearings.