Union Minister of State for Road Transport and Highways Mansukh L Mandaviya today said the Centre has approved a project to widen and upgrade National Highway 54 at an estimated cost of Rs 6,168 crore. <br/><br/>Mandaviya said the project would result in overall development of the region and help in improving sub-regional socio-economic development, growth of trade and tourism within the country and with eighbouring countries.<br/>