から “眠っている警官” 現代の高速道路へ: スピードバンプの秘密の歴史

Trace the history of speed bumps from ancient Pompeii to Arthur Holly Compton’s 1953 invention, イギリス人 “sleeping policeman” slang, and Australia’s own silent cop traffic-calming story.

Trace the history of speed bumps from ancient Pompeii to Arthur Holly Compton’s 1953 invention, イギリス人 “sleeping policeman” slang, and Australia’s own silent cop traffic-calming story.