Check out this new 2.1km bicycle tunnel in Jerusalem. The tunnel was built for a sewage pipe with a one-lane road next to it for the water company to use to maintain the pipe. But they've recently modified it to now have a two way bike path.
he tunnel is three meters wide, and although it contains a large sewage pipe, it is well ventilated and there is no bad smell. Air-quality monitoring has shown that there is no exceptional pollution in the tunnel.
The path is being opened for a bike race, then closed for safety inspections and reopened in a few months. (Video) This is some great adaptive re-use - or adaptive better use or something.... It's awesome regardless of what you call it.
Two years ago, Eyal Haimovsky, CEO of the Jerusalem Development Authority decided to pave a track through the tunnel, above the water passage, and add it to the Jerusalem circular biking trail, a 42-kilometer-long route that passes through several parks and nature reserves around the capital
It's a little close to this April Fool's Day post from 5 years ago.