If I catch their eye and I know they’re actually seeing me, that’s about the only time.
I try to make eye contact, especially where multi-use paths venture into intersections on a cross ride, because people ALWAYS drive right into the cross ride as they “stop” for their turn. But I’m finding more and more that the tint on many vehicles makes it impossible to even see if the driver is looking at you. So, I’m often forced to stop waiting for them to stop, just so I can continue with my right of way. Incredibly frustrating, but you’ve gotta stay alive.
And the screen is way more visible.
$1000 Canadian is a bit of an ouch, though.