- International Tunnelling Association
Encourages planning of the subsurface and promotes the use of tunnels.
www.ita-aites.org
- Tunnelbuilder
Features news reports of projects worldwide, and tunnel building dreams, errors, and horrors.
www.tunnelbuilder.com
- MrTunnel
Includes reports on major United States road tunnel projects.
www.mrtunnel.com
- Norwegian Tunnelling Technology
Covering history, projects, products, research, and development.
www.tunnel.no
- Tunnel Page
Directory of the world's longest tunnels, subsea tunnels, immersed tubes, railway tunnels, and old tunnels.
home.no.net/lotsberg
- FAQ - Transit Tunnels
Tips for exploring them on foot.
www.infiltration.org/transit.htm
- U.S. Federal Highway Administration - Tunnel Engineering
www.fhwa.dot.gov/bridge/tun.htm
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