Problem: bike lanes not obvious enough to motorists.
--> Solution: recycle some green bottles and cover the bike lanes with numerous small, sharp shards of glass.
I know from first-hand experience that this layer DOES cause tube punctures, and even passed that feedback to the local council once. Their reply basically just said I was wrong. I wish they'd staff the council with a few cyclists who actually use roads and paths and know what the problems are.
Earlier this week, I noticed freshly laid green glass on several sections of the bike lane along Nicholson St East Melbourne. This morning, I avoided it and went along Wellington St instead, only to find that it had also had the same treatment, although probably 1-2 months ago, as it didn't look quite as new and loose.
It's almost as if they WANT cyclists to get punctures and be discouraged from using these streets.