I am digging those street lights !
The two cars, center and right look to have some type of duster or boot around the tires. The one in the middle looks like a small broom attached to the front wheel. Enlarge the photo to see better.
In some places the businesses would burn the packing crates and any other scraps for heat, then throw the ashes with nails out in the street. When it was a real problem and you drove much there the car and truck owners with pneumatic tires would put scrapers on the tires to try to keep the nails that got picked up by the tires from getting embedded and puncturing the tires. Hard rubber tire salesmen loved nails. Most localities banned spreading ashes in the street. Duh!
Oh yeah, if you think it was a problem with tires, how about horses!
I used to do antique cars in movies, the carpenters constructing sets used to leave nails scattered everywhere. One of my friends did horse-drawn stuff and he used to walk around with his eyes on the ground, would have a pocketful by the end of the day. Used to say 'you just have to change a tyre, I can end up with a permanently lame £2000 horse'.
That's why I use hard rubber tyres on all my horses.