Yellow bikes are hanging from trees and suspended on lamp posts. They're dangerously close to train tracks and splayed across footpaths. They've been seen parked atop portable toilets and some are even submerged in the Yarra River.

Melbourne, this is why we can't have nice things.

Singaporean company oBike had a good idea when it thought up a way to bike-share without having to return the bike to a specific dock. If you want a bike, you just use an app to find the nearest one. When you're at your destination, you can conveniently leave it right there. In the meantime, you're lessening congestion and doing good for the environment by cycling instead of driving.

The system seems to have been working pretty well in Singapore, with the company claiming that over 100,000 oBike trips are made there each day. However, the concept hasn't translated well to other places. It's not just Melbourne. The bikes were banned in the Netherlands this month for causing obstructions. In London, oBikes have been mangled, parked on highways and thrown onto train tracks.