Thanks to Chris for pointing out an interesting article on an ingenious piece of cycling infrastructure:
The city of Haarlem wanted to create a barrier free passage where a main
arterial route for motor traffic and a main cycle route along a river
bank crossed each other’s paths. But there was no space for an overpass,
and a tunnel right next to a river was not such a great idea either. So
designers came up with the plan to lead the cycle route through the
river under the approach span of the two existing drawbridges for the
arterial road. A perfect idea, but there was just one small problem:
there was not enough clearance, the bridges were almost 30 centimetres
or a little under a foot too low. So what do you do?
Read on at http://bicycledutch.wordpress.com/2013/09/19/submerged-bicycle-bridge-in-haarlem
