Yes they often have grass and plants&#x2F;trees in the middle, which both discourages people from walking across and stops you seeing ahead when you are driving, which makes you drive at a more cautious speed.<p>Or they can be huge and have underpasses like the massive (now demolished)  &#x27;hole in the road&#x27; in Sheffield, or this beauty in East London (1m25s in) <a href="https:&#x2F;&#x2F;youtu.be&#x2F;Smbfm4unjh8" rel="nofollow">https:&#x2F;&#x2F;youtu.be&#x2F;Smbfm4unjh8</a>