Tramwaje Warszawskie Company in Warsaw has started to modernize the track infrastructure. The previously used methods of attaching induction loop cables caused damage to those cables by track vehicles.
Innotechnika company created a chamber design for induction loops attached to track sleepers.
The chambers are made of POLIPIT plastic and equipped with maintenance-free SMC covers.
The chambers, of type TP 20/7, for induction loops, have been installed on trackways since 2015. They are not subject to damage during the operation of the trackways.