1. Some aspects of loop design;Allen,1963
2. A Policy on Geometric Design of Rural Highways;American Association of State Highway Officials,1954
3. Safe side friction factors and superelevation design;Barnett;Proc. Highw. Res. Bd,1936
4. Progress report of the Human Factors Committee;Cumming;Aust. Rd Res.,1962
5. Perceptual basis of vehicular guidance;Gordon;Publ. Rds,1966