The road runs concurrently with four other roads over its course, first with the Dutch A37 from its western terminus to the German border, then with the German B402 up to Haselünne, from there on it follows B213 up to northern Cloppenburg, and on the last 2 kilometers of the B213 concurrency it also runs concurrent with B72, which it then follows up to its eastern terminus at the A1, which is also part of E 37.