Some cars are already fitted with an accident alert system, following a crash it automatically alerts the emergency services, giving locations etc, perhaps these could be made compulsory fitted as well. Cost, I hear you say but when the government made tachograph's compulsory a lot of owners complained about the costs involved, an average kit was about £500, this was forty years ago, and it cost fleet owners many thousands of pounds but it was made compulsory to save lives.
fitting a hands free kit/ jammer.
Inconvenient? yes, costly? certainly but which is more important, saving money or saving lives? Bigger fines might work but as most drivers have a built in "it won't happen to me" syndrome, how long will it be and how many lives lost before being fined finally works.