Last night Norm, Jan, Sukie and I were traveling to Chinatown in NYC on I-78 around Newark Airport when the left front tire of Norm's car blew out. He brought it to a safe stop, but there were only inches between 65+ mph traffic and the wounded tire that we needed to replace.
Sukie jumped into action with her bright yellow umbrella. She walked about 100 feet back towards the oncoming traffic and held out the open umbrella to warn the drivers.
It obviously worked.
So two morals. Don't have a flat tire in a congested area like this and carry a bright yellow umbrella.
My first new car was a bright yellow VW Rabbit. The color does an outstanding job of being visible in overcast situations. One wonders why there aren't more yellow cars..