It's funny because when I lived in Texas, we just turn on windshield wipers on full blast, put the hazard lights on and drive around at 15mph. (This would have to be an epic downpour though.)
The only time people stopped was when it was hailing.. and then they would hide under bridges if they could.
I remember driving past Charles de Gaulle Airport when it rained so hard we couldn't see past the end of the bonnet (hood). Everybody just stopped until it passed.
The only time people stopped was when it was hailing.. and then they would hide under bridges if they could.