Corduroy Road in the Frontline

A completed corduroy road made by the German pioniertruppen was often settled in by running a tank or other heavy vehicle down it before the 'ribbon-cutting ceremony'. The guide rails on the edges were a standard fixture. Beneath the surface logs are at least five stringer logs running the length of the road surface. Depending on the depth of the mud it might require several layers of cross-laid logs. Ideally a layer of sand, earth, or gravel would be laid on the surface for a smoother ride.

Source :
Book "German Pionier 1939-45: Combat Engineer of the Wehrmacht" by Gordon L. Rottman

German Infantry Crossing the River

Improvisation and ingenuity were characteristic of the German Pioniere, even though their makeshift solutions could not always be fully appreciated by the men using them. This improvised footway, built using medium-sized inflatable boats, planks, and timber, enables the infantry to get across the river, but judging from the look of the machine gunner in the foreground something more stable would have been appreciated.

Source :
Book "German Pionier 1939-45: Combat Engineer of the Wehrmacht" by Gordon L. Rottman