Passo San Boldo

Passo San Boldo
	South side of Passo San Boldo
Pass height	706 m slm
expansion	SP 635 (south ramp, single lane with traffic light control)
Built	1918
particularities	Exceptional street layout with five narrow spiral tunnels
	map
Coordinates	46 ° 0 '18 " N , 12 ° 10' 11" E Coordinates: 46 ° 0 '18 " N , 12 ° 10' 11" E

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The Passo San Boldo (formerly Passo Sant'Ubaldo, also Umbaldopass) is a small alpine pass in the Italian region of Veneto between the places Trichiana (329 m) and Tóvena (272 m) over a distance of 17 km.

The pass is located on the southern edge of the Alps and connects the Val Belluna with the Val Mareno over a height of 706 m slm.The pass road is called SP 635 (before 2001 state road SS635) and is only passable in one lane, the traffic is regulated by several traffic lights. There is a speed limit of 30 km / h and a height limit of 3.00 meters after buses got stuck in the tunnels. The uniquely bold route of the south ramp in a Sack Valley enclosed by almost vertical rock faces is worth seeing. The top of the pass can only be reached through five narrow spiral tunnels blasted into the rock and over six bridges.

history

Already at the end of the 19th century they wanted to convert the steep path over the pass into a drivable road. But it was not until World War I, between February and June 1918, that the pioneers of the Austro-Hungarian army succeeded in building this road to supply the Piave front in a record time of only three months. The building is called Straße der 100 Tage because of its short construction time. POWs and the elderly, women and children of the local population were also used as labor . In the final phase of construction, 1,400 workers worked in three shifts to build this strategically important link. For the transport of heavy artillery and supplies , the incline could not be more than 12% despite the extreme topographical conditions. The construction is still considered a technical achievement today.

Web links

Commons : Passo San Boldo - collection of images, videos and audio files

Report on the construction of the pass road during World War I, 1918