ye ek mithak hai ki sirf electric trains hi tez chalti hain. disel engine aur steam engines bhi 110-160 ki speed pe chate hain. fark sirf 'pick up' mei tha. electric trains ki pick up achhi thi. magar adhunik disel engines jaise WDP4D ki pick up electric loco ki tarah hi fast hai.
halanki electrification must hai kyoki isse polution nhi hota aur disel ki bachat hoti hai.