A route 67A bus in Pittsburgh.  Bus No. 2552 is a <a href="https://en.wikipedia.org/wiki/Flxible_Metro" class="extiw" title="en:Flxible Metro">Flxible "Metro"</a>.
myself (<a href="//commons.wikimedia.org/wiki/User:Piotrus" title="User:Piotrus">User:Piotrus</a>)
CC BY-SA 3.0
<span class="int-own-work">Self-photographed</span>