[5] However, in July 2024, the city council voted not to resume service – to make the suspension a permanent closure – albeit with a proposal floated for a future tourist trolleybus operation along the banks of the Mondego River, without further detail given.

[8]: 212, 220 Initially, the trolleybus system only partially replaced Coimbra's tramway network, but after several decades of concurrent operations the latter was closed, in January 1980.

[9] In March 2021, all trolleybus service was suspended, initially because of road works[4] and later because of disruptions caused by construction of a Bus Rapid Transit line (named Metro Mondego).

Although suspended (operated by motorbuses) since 2021, their overhead wiring was being kept intact except for short sections affected by the BRT construction, as both routes were expected to resume after the latter is completed.

To cope with the steep gradients of the Coimbra system, they were fitted with 125 horsepower (93 kW) 600-volt motors, and each trolleybus carried two compressors, normally designed to work together, but each capable of maintaining the air supply for braking and door operation if one should fail.