India has 70,934 km (44,076 mi) of national highways (NH) connecting all the major cities and state capitals as of August 2011. Most of them have two lanes. About 10,000 km (6,200 mi) have been widened to four lanes with two lanes in each direction. Only a few of NH are built with cement concrete. As of 2010, 19,064 km (11,846 mi) of NH were still single-laned roads. The government is currently working to ensure that by December 2014 the entire National Highway network consists of roads with two or more lanes.