DW.COM: "Total cost for the 101 kilometers is estimated at around 184 million euros - that's about 1.8 million euros per kilometer.Bike highways get bikes out of the way of cars to allow more and faster auto traffic. They cost a lot of money and do nothing to reduce sprawl or growth. They actually make autosprawl worse.
Almost three-quarters of this (126.5 million euros) will be used to actually build the roads to the required standards. The rest will be distributed among taxes, planning costs, land purchase and illumination infrastructure."