sentences:  Besides the provision of a driver's cab on the CC version of the MP 89, another key difference between the CC and CA stock is the interconnecting gangways between trains.Most of the CC stock are equipped with reinforced gangways, which consists of solid interior panels.This was designed mainly due to fears that the curved platforms on Line 1 (such as Bastille), as well as storage of the trains within the tunnels, could cause significant damage to rubber gangways.