The Chrono 1 line is supplemented by five other lines:
- Line 3 runs north east of Saint-Quentin between the SNCF train station and the Salicamp shopping centre. It also runs past the administrative centre, the Saint Claude private hospital and the Lycée Colard Noël.
- Line 4 runs through Saint-Quentin from east to west from the "Libération" station to the Fayet shopping centre. In particular, it serves Saint-Quentin's sports facilities: the Jean Bouin swimming pool, the Pierre Ratte sports centre and the urban leisure centre (BUL).
- Line 5 runs from the Neuville district, in the south west, to the Fayet shopping centre in the north west. It runs past the collège Marthe Lefèvre, the train station, the hospice Cordier and the hospital.
- Line 6 runs between the Gauchy and Fayet shopping centres to the south. In Saint-Quentin, it stops in the town centre, at the Henri Martin and Saint-Jean lycées or at the ZAC du bois de la Choque.
In addition to its regular services, the Pastel network meets the specific needs of three categories of passengers:
- Users needing an end-to-end service;
- Those who are travelling for professional reasons;
- Users wanting to travel in the conurbation.
To limit the number of kilometres without reducing the solutions offered, Pastel buses only run to the stations at the end of the line at the request of passengers, who have access to dedicated call buttons. Workers can take advantage of urban transport outside the network's opening hours. Indeed, Pastel provides them with a booking service via a toll-free number. A similar service is also available for users wanting to travel within the conurbation. Finally, the Pastel offer also includes the rental of ordinary and electric bicycles.
The flexible Pastel network therefore combines regular supply and supply on demand. The comprehensive network criss-crosses the town of Saint-Quentin and also runs to the other municipalities in the CASQ.