As of December 13, 2020, the TPF's line 6 has been converted into trolleybus operation thanks to the powerful batteries of the new lighTram 19 DC trolleybuses. Not a single meter of new catenary has been hooked up. 55% of the route is electrified, as follows:
Guintzet — Bertigny : Battery (1.32 km)
Bertigny — Boschung : Catenary (3.61 km)
Boschung — Windig — Musy : Battery (1.59 km)