Dublin Port Tunnel - Tunnel Specifications

Tunnel Specifications

  • Length: 4.5 km (2.8 mi) - total project 5.6 km (3.5 mi)
  • Bores: 2
  • Bore width: 11.77 m (38 ft 7.82 inches)
  • Lane width (two per bore): 3.65 m (11 ft 11.70 inches)
  • Shoulder width (two per bore): 1 m (3 ft 3.37 inches)
  • Bore height: 4.9 m (16 ft 0.91 inches)
  • Operating height: 4.65 m (15 ft 3.07 inches)
  • Lowest point: -30 m (-98 ft 5.10 inches) at Marino

It is the third-longest urban motorway tunnel in Europe after Madrid M-30 and Södra Länken in Stockholm, Sweden. When non-urban road tunnels are included, the Dublin Port Tunnel is shorter than some other European tunnels, such as the Lærdal Tunnel (Norwegian: Lærdalstunnelen) in Norway (24.5 km), the Gotthard Road Tunnel in Switzerland (17 km), the Mont Blanc Tunnel between France and Italy (11.6 km) and the Western Scheldt Tunnel (Dutch: Westerscheldetunnel) in The Netherlands (6.6 km).

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