This is one of those give them an inch they WILL take a mile scnerios. I can't stand distracted drivers but I also cannot stand the slippery slope of slowly and incrementaly giving away rights. This will set a very dangerous precedent to warrantless searches.

More than likely a distracted driver will cause an accident anyway so they will be charged with insurance responsibility and possibly points by the police as is.

But any law giving the police the ability to perform a warrantless search set a very dangerous precedent and should be avoided.