Traffic Radio - Is this a winning format?

As Radio Netherlands (Holland's external service) discontinues all its radio programmes in the Dutch language this Friday, including a popular programme for truckers travelling across Europe. I was curious to see this flag flying a little further down the street. It belongs to Traffic Radio which turns out to be an IP based station which you can listen to on your mobile phone and on the web. You had better have an unlimited plan if you're listening on the iPad or the phone because audio gobbles up data even with clever audio compression. Also curious about the format - which, surprise surprise, is billed as a radio station with music and all the latest traffic news, shows about cars, etc. In this era of in car navigation systems, aren't the days of the traffic bulletins read out over the air somewhat dated?