Bridges deemed impossible, designing with tight restrictions in place

Bridge design is often shaped by constraints such as budget limitations, spatial restrictions, and environmental considerations. Rather than hindering creativity, these challenges can serve as catalysts for innovative and efficient solutions. This paper looks at three case studies, each with an unique approach to overcoming design limitations. In Ankeveen, we designed a low-budget pedestrian bridge to avoid the need for a tender. This was realised in a streamlined design-build team, where costs and materials were reduced. In Brussels, we proposed a pedestrian bridge instead of the requested bicycle bridge, greatly reducing the footprint of the bridge. In Perth we designed a bicycle bridge that takes into account cultural heritage and environmental vulnerability, minimising the impact on the river and island. These examples highlight how adaptive strategies, such as collaboration, material efficiency, and context- driven design, lead to functional, elegant, and sustainable footbridges. By embracing constraints, designers can create infrastructure that enhances both mobility and the surrounding environment.