When I started primary school in London in 1948 we would have at least one visit from the local policeman each year to tell us all of the dangers for pedestrians crossing the road.
These were the days that you were respectful of the police, because they might apply light physical punishment, and if necessary visit your parents at your home to let them know what you had been up to. Retribution from your father often followed.
When I was a bit older the BBC television had a series of Information adverts concentrating on road safety, such as: Clunk Click, Every Trip so you remembered to use your seat belt.
All the Brits that remember that ad know that the narrator was a notorious paedophile.