Bombardier Guided Light Transit
Guided Light Transit (GLT, French: Transport sur Voie Réservée or TVR) was the name of guided bus technology and associated infrastructure manufactured by Bombardier Transportation (now Alstom). Two GLT prototypes were designed and tested from 1987 onwards by BN in the region of Rochefort in Belgium.
Source: Wikipedia — Bombardier Guided Light Transit (CC BY-SA 4.0)