Flaggers are reinstated at certain railroad crossings in the Swansea neighborhood in Denver

DENVER, CO - AUGUST 27: Flagger David Christ puts his finger in his ear to keep out the sound of the loud horn of the train as he holds up a stop sign to keep drivers from going around the railroad crossing of the A Line train at York street between East 40th and East 41st ave on August 27, 2018, in Denver, Colorado. Christ said this is the first day working as a flagger and said he has seen at least 60 trains go by during his shift that started at 7:00am. Christ forgot to bring ear protection for the job but vowed to bring them tomorrow. (Photo by Helen H. Richardson/The Denver Post via Getty Images)