TIL the first traffic signal, erected in London in 1868, was powered by gas. A gas leak caused it to explode a month later. standard.co.uk Submitted by itsjonzo t3_10o6fs5 on January 29, 2023 at 12:20 PM in todayilearned 17 comments 1,024
BillTowne t1_j6ee5jq wrote on January 29, 2023 at 7:35 PM Interesting fact: It was designed by the great grandfather of Elon Musk. Permalink 2
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