The correct answer is 75 km. National Highways Authority of India - NHAI and its contractors have entered Guinness World Records for laying 75 km long continuous Bituminous Concrete Road in record 5 days. The work has been completed in a record time of 105 hours and 33 minutes. The Amravati to Akola section is part of National Highway-53 and an important East-West corridor. Important PointsThe work was carried out in a single lane on NH-53 section between Amravati and Akola in West Vidarbha. This Project was carried under ongoing Azadi Ka Amrit Mahotsav Initiative by NHAI. Additional InformationNHAI:The National Highways Authority of India or NHAI is an autonomous agency of the Government of India, set up in 1995. It is responsible for management of a network of over 50,000 km of National Highways out of 1,32,499 km in India. It is a nodal agency of the Ministry of Road Transport and Highways. It is headquartered in New Delhi.