While its a tragic event, it loses its impact due to incidents like this being so common in Turkey. I don't think there's a week goes by without multiple deaths from road traffic incidents being reported across the country, in a variety of circumstances, but often involving buses or minibuses.
Policing, education, road signage & maintenance and folks general approach to safety on the roads are all factors. Unless votes are an issue, don't expect changes soon.
You might think its safer travelling by train - unfortunately, within Europe Turkey is consistently in the top ten rail deaths list which considering its limited rail network (given the size of the country) is pretty shocking.
JF