According to the prize-awarding jury of the English Institute for Ergonomics and Human Factors, the application of the so-called IDED method is, in particular, a revolutionary development in this area. IDED stands for Image Degrading and Edge Detection, a method for taking photos of dangerous situations that are subsequently processed to produce an image as would be seen by a visually impaired person. The image is then further processed to emphasize contrast-rich regions, thereby accentuating those traffic elements that are important for the timely detection of obstacles and markings.
Paul Schepers (Netherlands Institute for Transport Policy Analysis) and Barry den Brinker (Amsterdam University) researched 21 accident locations in this manner and concluded that it is important, among other things, to make the bike path borders stand out more clearly from their surroundings. This could be done, for example, by making curbs lighter in colour or otherwise placing distinguishable markings. The complete article can be freely downloaded from this location.