I got off and walked on my traffic-infested hill again - but I started even earlier and caught up with the car I was stuck behind.
0.16 miles, downhill -3.84 MPH - 2 minutes 30 seconds of walking, versus the same time sitting on the brakes versus a somewhat iffy filter...
It has the added benefit of blocking the way of selfish pavement cyclists - I swear I'm routinely mistaken for a copper sometimes - and there are a few around on bikes at the moment.
Those PCSO's on bikes always seem to be in too high a gear whenever I see them.