Single train matlab kya. Guna se bpl ju bhi hoti. Ab har jagah se to doosri jagah k liye train nahin ho sakti na. Change to karna padega.
N train se kisi ko issue nahin, uske loss me chalne se hai, jab instead agar wo mainline se chale to shayad double earnings ho jaye.
Plus I don't know how are you calling it passenger cum ice. Achhi khasi ice hai charging people at sf rates.