Read this: http://radioassistant.com/europe/2014/06/dab-in-tunnels-soon/
Summary: Their biggest problem in going digital is to put DAB in the tunnels. Why is DAB in tunnels taking so much longer than building transmitter sites around the mountainous countryside of Switzerland Safety for the road users and how tunnel control centers get in touch with drivers. - radioassistant.comradioassistant.comhttp://radioassistant.com/europe/2014/06…
Lots more recommendations to read at Trends - ukfree.tv.
Summaries are done by Clipped-Your articles and documents summarized.