The B14 project b/n Backnang-West and Nellmersbach in Baden-Württemberg has a length of 7.6km. AADT was about 22,000 vehicles/day in 2010 and it's planned to built a 4-laned road with hard shoulders. It also contains the 2nd Murr viaduct (2nd c/w, the old one was recently reconstructed) and a 135m tunnel in Waldrems.
The plan approval order was passed in November 2005 and building permit (Baurecht) is available since October 2007. Total costs: about 144 million €.
The project was split by the state's ministry of transport in 2011. It was planned to built section 1 first. It has a length of 1.9km and includes the Waldrems tunnel. The estimated costs were 38.93 million in 2012. This section was split by the Federal ministry of Transport now. Just 10 million € are funded! That's about 25% of BA1 costs (inflation is about 2-3%/year) and less than 7% of the total 7.6km section costs!
Good news: construction works of section 1.1 should begin in April 2016 (
source) and should be completed by 2017 (
source).