Re: Knee jerk reaction
Unsurprisingly if you limit your focus to the people wearing seatbelts ... they make some difference.
How many of those crashes wouldn’t have happened if people hadn’t been so mollycoddled in their cars?
How many extra people *not* in cars were killed because ‘I’m alright Jack’ wasn’t driving with due care and attention?
Overall road deaths haven’t been dented by seatbelt introduction, popularisation or legislation.
Measure only people who have had a crash whilst wearing them and you see a benefit, look at society as a whole and it vanishes.