Wisløff chaired the publicity body Opplysningsrådet for Veitrafikken from 1976 to 1989, and the employers' associations Asfaltentreprenørenes Forening and the European Asphalt Pavement Association. He helped found both these organizations. From 1980 to 1990 he was the deputy chairman of the Norwegian branch of the Nordic Road Association. He received an honorary prize from this organization in 1993, and became an honorary member in 1994. In an obituary he was called "the grand old man of asphalt".
