The distribution pattern of the Railway network. . The northern plains with their vast level land, high population density and rich agricultural resources provided the most favourable condition for their growth. . In the hilly terrains of the peninsular region, railway tracts are laid through low hills, gaps or tunnels. . The Himalayan mountainous regions too are unfavourable for the construction of railway lines due to high relief, sparse population and lack of economic opportunities. Likewise, . It was difficult to lay railway lines on the sandy plain of western Rajasthan, swamps of Gujarat, forested tracks of Madhya Pradesh, Chhattisgarh, Odisha and Jharkhand. . The contiguous stretch of Sahyadri could be crossed only through gaps or passes (Ghats). . The development of the Konkan railway along the west coast has facilitated the movement of passengers and goods.