Specifically when the road they are crossing has bicycle signs on it, such as this crossing in Versailles:
The road going horizontally (left-right) on the picture is a normal road (for cars) and the one vertical (with the people walking) is a bike path (yes, despite people walking on it - it is better than the parallel one for pedestrians, on the left, on the other side of the green band).
While this picture depicts a specific crossing, the question is general for crossing of road/bike roads where there are bicycle markings (bike logos) on the crossing.