This one boggles the mind. I had to send it for publication in Risks.
The Risks Digest Volume 24: Issue 93
Computer Failure Causes Closure of Seattle Downtown Transit Tunnel
The tunnel was opened, and then closed again the next day due to continued problems:
Technicians from Sound Transit, Metro and General Electric Transportation, which was contracted to install the electrical and computer systems, were trying Wednesday evening to figure out what caused a connection between the tunnel and the control center to fail Monday, work Tuesday, and then fail again.
The tunnel’s electrical systems, which control the lights and ventilation, are working, Sound Transit spokesman Bruce Gray said. But the disruption prevented Metro’s control center from remotely running the systems. For safety, Sound Transit and Metro decided to keep the tunnel closed.
It is supposedly open again:
RPIN - View News Release
** Downtown Seattle Transit Tunnel open Thursday morning (Dec 27th)**