I drove past this car early this afternoon and turned around to help as it was obviously stalled. Apparently at high temperatures these older cars are susceptible to vapor lock.
According to the driver (not the owner) this is a 1932 Pierce Arrow and cost about $9000 at the time. That’s a lot of money back then, especially considering this was during the great depression.
I couldn’t jump him since it’s a 6 volts system and we decided he was safer where he was so we elected not to push the car off the highway to a less visible spot.
You can read more about Pierce Arrows here.