Study the following statements regarding creep. (i) Creep is greater on curves than on tangent railway track, (ii) Creep in new rails is more than that in old rails, (iii) Creep is more on steep gradients than on level track. The correct answer is

Railway engineering is a multi-faceted engineering discipline dealing with the design, construction and operation of all types of rail transport systems. (Source: Wikipedia)

Engineering subjects that are part of railway engineering include:

Mechanical engineering.
Command, control & railway signalling. Office systems design. Data center design. SCADA. Etc
Electrical engineering. Energy electrification. Third rail. Etc
Civil engineering. Permanent way engineering.
Light rail systems.
On-track plant.
Rail systems integration.
Train control systems. Cab signalling.