They're making a Patlabor movie! And these could be the first pictures from the movie's set. That, or a new way for Japanese cops to keep the peace.
"Patlabor" is short for "patrol labor" and follows police in the near future who use mecha. The Patlabor anime and manga debuted in 1988, and earlier this spring, a "live-action" Patlabor feature film was announced for 2014.