Guided bus route Foundation blocks for the concrete busway.
<a rel="nofollow" class="external text" href="https://www.geograph.org.uk/profile/3176">Hugh Venables</a>
CC BY-SA 2.0
From <a rel="nofollow" class="external text" href="https://www.geograph.org.uk/photo/778859">geograph.org.uk</a>