NEW DELHI: The construction of highways touched an all-time high of 6,029km during 2015-16. Prior to this, a maximum of 5,732 km of national highway was constructed during 2012-13.Officials said while NHAI reported construction of nearly 2,000 km, the rest came from works done by the road transport ministry through its agencies including state public works departments, Border Roads Organisation and ministry's entity NHIDCL for undertaking works in hill states. TOI on January 10 had first reported how the total construction was set to cross 6,000-km mark.Though surpassing 2012-13 record by merely constructing one extra km per day may not be that big achievement, sources said the increased pace of construction will now continue for the next few years.