The bypass reduces the problem of congestion in Bratislava, cutting journey times. The cost of the project has climbed however and was previously expected to cost around €1 billion to build.
The plans call for the tunnel to be driven using a TBM instead of using drill and blast techniques as has been favoured in Slovakia previously. The alignment of the tunnel runs under the Small Carpathian mountain range and the project is being managed by Slovakia’s national roads company, NDS.