Ron from Jefferson County writes, “Along Clear Creek canyon, US 6, as you enter any of the tunnels the lights are on halfway ...

The study of tunnel lighting systems has evolved into a multidisciplinary endeavour that integrates advanced optical engineering, material sciences and sustainable design. Contemporary systems not ...

(MENAFNEditorial) Tunnels are challenging environments due to pollution round-the-clock traffic and the corrosiveness associated with high levels of humidity, exhaust fumes and fluctuating ...

Border Patrol agents uncovered a man-made tunnel connecting Ciudad Juárez to El Paso early Thursday, equipped with lighting, ventilation, and wood bracing, U.S. Customs and Border Protection officials ...

Six years after first approving new lighting as a safety measure, BART has yet to install the brighter LED lights engineers say will aid evacuation in the darkened subway tunnel running under San ...

Q: Your answer to a reader’s request that Caldecott Tunnel lighting be improved was incorrect. You said that Caltrans reported that it has improved the lighting in all bores of the tunnel. I drove ...