Through informal surveillance passengers can both see and be seen by passers-by, road users, residents and local workers. If a path, platform or shelter is remote from view, travellers will often feel unsafe and avoid using it. Opportunities for vandalism will be increased. Informal surveillance can be enhanced, for example, by siting platforms on embankments rather than in cuttings, and by the presence of nearby traders. The open design of vehicles enables passengers to be within the sight of staff and other passengers.
Mirrors can enable a bus driver to observe vulnerable areas of the vehicle.
Consideration should be given to using shorter vehicles and single deck buses. Boundaries may be needed to define the perimeters of transport infrastructure. These need to be constructed in a way that does not restrict informal surveillance. For example, a high solid wall obstructs visibility while, 'open' fencing does not. Landscaping can improve the appearance of the infrastructure and create harmony with the local environment, but care needs to be taken to ensure that landscape features do not become targets for vandalism or provide cover for criminal activity.