Tunnel inspection worldwide: SPACETEC references
Since the completion of our first tunnel scanner in 1990, we have carried out tunnel inspections for countless clients around the world.
27
Countries
> 2800
Scanned tunnels
> 3300
Tunnel length (km)
> 6400
Scanned section (km)
Our clients include many renowned rail, metro and motorway companies, engineering offices and public authorities.
The tunnels we have surveyed include such well-known Alpine tunnels as the Gotthard, Simplon, Arlberg and Montblanc tunnels, as well as metro networks in many cities around the world, including Barcelona, Hong Kong and Brussels. Here is a selection of our references.
Railway tunnels (selection)
| Country | Client | Number of tunnels |
| Belgium | SNCB | 68 |
| Germany | DB | 288 |
| France | SNCF | 570 |
| Finland | VR-Track | 44 |
| Ireland | IE | 14 |
| New Zealand | Tranz Rail | 134 |
| Austria | ÖBB | 283 |
| Portugal | REFER | 101 |
| Switzerland | SBB | 266 |
Metros/ premetros (a selection)
| Country | Client | Distance scanned |
| Australia | Sydney Metro | 12 km |
| Belgium | Brussels Metro | 50 km |
| China | Hongkong Metro (MTR) | 56 km |
| Germany | Frankfurt U-Bahn | 52 km |
| France | Paris Métro | |
| Italy | Milan Metro | 4 km |
| Canada | Montreal Metro | 160 km |
| Spain | Barcelona Metro | 84 km |
| Taiwan | Taipei Metro | 70 km |
| USA | New York City Subway | 5 km |
Road tunnels
488
Number of tunnels
397
Total tunnel length (km)
Channels/pipelines/shafts
34
Number of projects
25
Tunnel length (total)
The longest tunnels we’ve measured
| Tunnel | Country | Length |
| Gotthard Base Tunnel | Switzerland | 57,000 m |
| Lötschberg Base Tunnel | Switzerland | 34,600 m |
| Simplon Tunnel | Switzerland | 19,823 m |
| Furka Tunnel | Switzerland | 16,000 m |
| Münsterer Tunnel | Austria | 15,990 m |
| Terfener Tunnel | Austria | 15,875 m |
| Ceneri Base Tunnel | Switzerland | 15,429 m |
| Gotthard Tunnel | Switzerland | 15,002 m |
| Savio Tunnel | Finland | 13,575 m |
| Inntal Tunnel | Austria | 12,756 m |
| Wienerwald Tunnel | Austria | 11,804 m |
| Landrücken Tunnel | Germany | 10,779 m |
| Lieråsen Tunnel | Finland | 10,700 m |
| Arlberg Tunnel | Austria | 10,649 m |
| Münden Tunnel | Austria | 10,525 m |
| Katzenberg Tunnel | Germany | 9,385 m |
| Kaimai Tunnel | New Zealand | 8,850 m |
| Rimutaka Tunnel | New Zealand | 8,779 m |
| Ricken Tunnel | Switzerland | 8,603 m |
| Grenchen Tunnel | Switzerland | 8,577 m |
| Otira Tunnel | New Zealand | 8,565 m |
| Tauern Tunnel | Austria | 8,373 m |
| Hauenstein Base Tunnel | Switzerland | 8,135 m |
| Rennsteig Tunnel | Germany | 7,916 m |
| Dietershan Tunnel | Germany | 7,375 m |
| Sanyi Tunnel No.1 | Taiwan | 7,355 m |
| Abalajís | Spain | 7,273 m |
| Severn Tunnel | England | 7,000 m |
| Finne Tunnel | Germany | 6.970 m |
| Bibra Tunnel | Germany | 6,467 m |