generic divided roadway curve
<a href="//commons.wikimedia.org/wiki/User:Useddenim" title="User:Useddenim">Useddenim</a> and <a href="//commons.wikimedia.org/wiki/User:Mahir256" title="User:Mahir256">Mahir256</a>
Own work based on: <a href="//commons.wikimedia.org/wiki/File:BSicon_vRP2rf.svg" class="mw-redirect" title="File:BSicon vRP2rf.svg">BSicon vRP2rf.svg</a>