 Work was scheduled to start around the clock from the start of the summer 2016 holidays until the end of the autumn holidays in a multi-shift operation.On 31 October 2016, the work was completed after four months and the tunnel was reopened for traffic.In this work, 23 of 161 blocks (about 194 metres) of the tunnel were rehabilitated and the remaining blocks are to be rehabilitated in various stages of construction until 2021.