Construction techniques used to build concrete retaining walls along a potential sliproad along the Castle Street-Mytongate section of the A63, Kingston upon Hull
<a href="//commons.wikimedia.org/wiki/User:Hullian111" title="User:Hullian111">Hullian111</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>