They don't use police boxes in London any more — and anyway, what would one be doing in my back yard? (ebooksdirect.dianeduane.com)
The blue police box thing is because the cloaking device — a TARDIS feature that allows it to disguise itself and remain out of notice no matter where it landed — got stuck when it landed in the 1960s Britain. (sarahbessey.com)
The next morning I walked past a Mazda suv with a bumper sticker reading «My other car is a Tardis» (that would be the time - traveling police box from Doctor Who). (discovermagazine.com)