The very first traffic lights were a manually operated and gas-lit. They were installed in 1868 outside the Houses of Parliament in Westminster (the UK). - Study24x7
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Kritima paliwal
27 Mar 2019 03:37 PM study24x7 study24x7

The very first traffic lights were a manually operated and gas-lit. They were installed in 1868 outside the Houses of Parliament in Westminster (the UK).

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