Why do you turn on your radio in a tunnel?

This is because they often have 'wideband' transmitters inside the tunnel itself- doesn't matter what frequency you are tuned to, it will pick it up- and they use this to issue alerts, traffic warnings etc (as well as in many cases they will have multiple low powered transmitters that retransmit the actual local radio ...



People Also Ask

Luckily, tunnels are highly unlikely to fall. Civil engineers work hard to build safe, strong tunnels. They know that tunnels have to stand up to forces of tension, torsion, compression, and shearing. Tunnels also need to carry the weight of people and vehicles traveling through them.

MORE DETAILS

Underground structures last a significantly longer life time than above-ground structures. Approximately about 50 years for above-ground, over 100 years for tunnels.

MORE DETAILS

From inside a building with thick walls or of mostly metal construction (or with dense rebar in concrete), signal attenuation may prevent a mobile phone from being used. Underground areas, such as tunnels and subway stations, will lack reception unless they are wired for cell signals.

MORE DETAILS

Make sure you get in lane early. Make sure your lights are on. It's really important to see and be seen – that sunny day won't make any difference when you're in a tunnel. Keep an eye out for speed limits, as they might change as you approach a tunnel so stay alert for signs near or on the tunnel entrance.

MORE DETAILS