Silvaplana Tunnel –
High Demands on Safety

For generations Silvaplana has represented an important traffic hub between North Bünden and the Engadin. Transit traffic is increasingly being seen as a burden. At the end of 2007 an outline project was approved (1,470 m bypass with tunnel; 70 mill. CHF /50 mill. euros) but its execution was delayed until requirements on tunnel safety were clarified. Thanks to prefinancing by the municipality it was possible to begin construction two years earlier than initially planned in other words in mid-2010.

The two-lane tunnel is provided with 1.50 wide pathways at both sides, possesses a 7.50 x 4.50 m...