One thing that's often overlooked is the noise levels of our streets (or environments more broadly).
Often I have to crank-up the volume on my phone because the street I'm walking along is so loud.
There are dump trucks, construction work, motorcycles, and buses driving and stopping only a few metres away, it can get loud very suddenly.
And I'm not traveling along highways. I live in downtown Vancouver, walking along one-way streets like Hornby.
Just something I've noticed recently.