Every train in the UK is fitted with a GSM-R cab radio system. It is now possible to retrofit a Tracksure sensor card to the Siemens cab radios and by picking up vibrations they transmit information that can detect under-track voids.
These voids are gaps that have developed between sleepers and ballast. In serious cases, they can lead to an increased risk of rail breaks, along with poor vehicle ride performance. Tracksure would therefore provide early warning of problems – especially at switches and crossings and at the transition to other high value assets such as bridges.