A strange little side quest
The rules may be simple on screen, but the backstory around Traffic Puzzle is anything but tiny. Silverstone hosted the first Formula 1 World Championship round on May 13, 1950. There is another connection worth keeping in the same mental pocket: The name Tetris combines a reference to four-square pieces with Pajitnov's interest in tennis. That gives Traffic Puzzle a little more company than it first appears to have.