one world trade center among the west village buildings at sunset manhattan new york city. - 行人紅燈 個照片及圖片檔
"Walk," "Don't Walk," "No Right Turn," "Thru Only": a complicated traffic signal to uncomplicate Washington, D.C., traffic, 1949.
Electric street sign showing the international symbol for "don't walk": a red hand held upright. This symbol replaces the old Don't Walk sign.
