Bhopal, Dec 17: 4,624 roads spanning 21,338 kilometres length have been constructed so far in Madhya Pradesh under Pradhan Mantri Gram Sadak Yojana. The most striking aspect of construction of these roads is that they have ushered in a new era in eight thousand 50 villages of the state by connecting them with main roads. These roads have been constructed at a cost of Rs 5437 crore.