In April 2011, TRN announced that it wanted to replace the trolleybuses in La Chaux-de-Fonds by 2014 with hybrid buses, sparking vigorous protests.

[4] All trolleybus service has been suspended since May 2014, initially because of a major project to rebuild the square in front of the railway station,[5] including relocation of the bus terminal.

Its initial operating company was the Compagnie des Transports en commun, La Chaux-de-Fonds (TN).

The system's first trolleybus line was the 3.54 km (2.20 mi) long Centenaire–Hôpital route, which had previously been served by trams.

In 1975, diesel bus route 9, which had been opened in 1966, was converted to trolleybus operation, and the following year the line to terminal 6 was extended.

In April 2011, TRN announced that it wanted to replace the trolleybuses in La Chaux-de-Fonds by 2014 with hybrid buses, sparking vigorous protests.

[4] Two main reasons were given for TRN's decision: the many road work sites in the city hinder the circulation of trolleybuses, and the forthcoming redevelopment of the Place de la Gare would require an investment of 2.5 million Swiss francs just to move the overhead wires as part of the relocation of the bus terminal.

[3] At that time, TRN had not yet decided whether the wiring would be reinstated after completion of the work on the bus terminal, leaving open the possibility that the current suspension might eventually be made a permanent closure.

After it was decided to reopen the system, an order was placed with Carrosserie Hess in 2021 for 18 new articulated trolleybuses of the type LighTram 19DC, with six due for delivery in 2023 and the other 12 not until 2026.