SHARP IDEA FROM SWEDEN (Jul, 1960)
SHARP IDEA FROM SWEDEN
JOYRIDING is the latest teenage craze in Sweden, and a large number of midnight cops-and-kids chases at Daytona speeds have ended in bad injuries and demolished cars. To discourage these shenanigans Swedish cops now use a strip of nails that can be laid across a road on which joyriders are careering. The hollow nails, if picked up, let air escape slowly, deflate tire within 200 yards.





British police use an object very like this, though designed to fold, for exactly the same purpose. It’s used in other countries as well.
http://en.wikipedia.org…