Cycle routes and greenways may have to pass over various obstacles: waterways, railway lines, busy roads and existing engineering works, etc. To ensure that cyclists, pedestrians and other non-motorised users can travel along continuous routes and avoid lengthy detours, crossings and bypasses must be developed, improved and made safe.

Some of these routes will be entirely dedicated to alternative modes of transport; while on others, cohabitation with motorised forms of transport needs to be planned to ensure a balanced share of the space and satisfactory levels of safety for all. This sheet provides some useful reference points to help find solutions for integrating crossing situations relating to engineering works (bridges, viaducts, tunnels, underpasses and overpasses) on such routes.