Road construction and maintenance company Bakwena on Friday said it was investing R1-billion to maintain and upgrade road infrastructure along the 385 km of the N1N4 it manages as part of its concession contract with the South African National Roads Agency Limited (Sanral). An estimated R273-million will be spent on the reconstruction of the N4 in Groot Marico, between Vaalkop and the Swartruggens boundary. The project, which was awarded in mid-2017 to G4Civils, is expected to be completed by April 2019.