The Hisgaura Bridge in Colombia remains a source of concern over its structure. The 653m bridge forms part of the Málaga—Los Curos highway and features the longest central span, at 400m, of any cable-stayed bridge in South America. However, Colombia's National Road Institute (Invias) has expressed its doubts over the bridge. Instability and potential high maintenance costs have been cited by Invias as grounds for this concern. The deck of the central section of the bridge is not properly level. It is not clear if this can be repaired or if it will have to be rebuilt.