This week’s Good Cycling Facility is a cycle path running next to a railway line in the Dutch city of Zwolle.
This path makes use of the railway alignment to form a direction connection into the city from the southern suburbs. At this precise point, the cycle path is crossing over a dual carriageway A-road on the same bridge as the railway. 
It makes a great deal of sense to run cycle paths and railway lines in parallel, principally because the cycle paths can benefit from the direct routes formed by the railway lines, and the absence of steep gradients. This is just one example of many, across the Netherlands.
One final point is that the cycle path has a separate footway and its own street lighting, to make it more attractive and safer in the hours of darkness.