Road aesthetics, an area of great interest to engineers, architects and landscape architects, is relevant from a traffic safety point of view, since it influences road users' perception and behaviour. A possible relationship between aesthetics and safety is described through inter-disciplinary research within arts and aesthetics, environmental psychology and traffic safety. This work has revealed less tangible areas of road design in which both architects and engineers may find potential support when planning for an aesthetically positive road environment taking into consideration human characteristics.