A childhood belief about road signs

When I was younger, my dad was a truck driver. He liked to joke with me a lot, and unfortunately, I didn't always know when he was joking. One day while on a road trip I saw a "Runaway Lane" for trucks. I asked my dad what it was and, being mean, he told me that Runaway Lanes were for truck drivers whose truck was going to explode. They could go up the Runaway Lane, jump out, land on cushions, and their truck would roll back down the lane and kill whomever was unfortunate enough to be driving behind him on the road. But hey, at least truck drivers like him would go home safely each night. I believed this for YEARS- much longer than I should have. I think I was 15 before I realized that wasn't true!