One element with 4 outlines  - complete adjustable in horizontal-plane and Z-endpoints - which biulds a multi-layerd street-curve with bezier-curve-geometry. On the edges, you can apply profile-manager-profiles.

AC-Edu-Aut - bpn-file (just rename it to pln)

https://www.dropbox.com/s/0iah7fp26uz2mou/Strassen3.bpn?dl=0

others: https://bimcomponents.com/Profile/b642d3f9-594b-42a5-ad35-8c86bce5f276