it is a long standing pet hate to see the heavy metal NO2 canisters rolling about the streets - they usually end up in the gutter dangerously close to passing bikes.

Also, if one get clipped by a car it can shoot across the road and cause damage or even hit pedestrians. Not mention the potential issues if flicked up into oncoming 40mph traffic...

So in two sessions today 8 canisters got removed from one Road, a mere 2-300m spread up & downhill.