As the journey continues one can observe another special feature of the Kalka-Shimla Railway is that as many as 27 cutovers serve as different gradient crossings. There are 20 intermediate stations, and all have crossing facilities. The line also has about 107 tunnels, which, besides representing the engineering feat, also generate a lot of interest in the travellers. During summer months, passenger traffic is heavy whereas in winter months, potato traffic keeps the line busy.