Integrity
The entire length of all three railways including the stations is included within the property boundaries. The boundaries of the property are adequate. The structural integrity has been maintained and the general infrastructure of the lines is today very close to the characteristics of the lines as they originally were. The functional integrity has been preserved though the lines have been systematically repaired and maintained. The integrity of use has been maintained and from the outset the lines have been used for large-scale and permanent transport, with all the characteristics associated with railway disenclavement of mountain areas. Traffic has been regular and continuous up to the present day, and it provides the whole range of initial services, particularly for passengers and tourists. The property is in a generally good condition with regard to infrastructure, technical operation and social use that enables it to adequately express its values. The main threats to the properties are the climatic and geological risks, which however have always formed part of the everyday operation of the three railways. All three areas might be considered areas for potential earthquakes. There is however also the risks of unauthorized encroachment close to the Kalka Shimla Railway, particularly in the buffer zone.