[May 6, 1921] May 6, 1921: New York policemen turn into human traffic lights under a new plan by Traffic Commissioner John Harriss to relieve congestion and improve road safety. Ten patrolmen are outfitted with the lights on and around Fifth Avenue.
from /r/100yearsago
[1921年5月6日] 1921年5月6日。根据交通专员约翰-哈里斯的一项新计划，纽约警察变成了人类的交通灯，以缓解拥堵并改善道路安全。十名巡警在第五大道上和周围配备了灯光。