Railway tracts are laid through low hills, gaps or tunnels in the hilly terrains of peninsular region. In the places such as Himalayan regions, it is not favourable to construct railway lines. In the past, it was difficult to lay railway lines in desserts of Rajasthan, swamps of Gujarat and forest areas of Madhya Pradesh. Recently, the development of Konkan railways in the west coast has facilitated the movement of passengers and goods in this most economic region of India.