Events

London police officers began operating the world's first traffic signal outside the Palace of Westminster on December 10, 1868, a gas-lit contraption designed to protect Members of Parliament from the crush of horse-drawn carriages on Bridge Street. The device, invented by railway engineer John Peake Knight, used semaphore arms during the day and red and green gas lamps at night. A uniformed constable operated it manually, raising and lowering the arms to control the flow of traffic. Knight had adapted the signaling technology already in use on Britain's railway network, where semaphore arms and colored lights had been managing train movements for decades. London's streets in the 1860s were notoriously dangerous. An estimated 1,100 people were killed annually in traffic accidents, a remarkable figure given that the fastest vehicles were horse-drawn. Pedestrians took their lives in their hands crossing major intersections, and Parliament, located at one of London's busiest junctions, was particularly hazardous. The traffic signal stood roughly 22 feet tall, with a revolving lantern at the top that displayed red for stop and green for caution. The semaphore arms extended horizontally to signal stop and were lowered to a 45-degree angle to indicate that traffic could proceed with care. The system worked well enough during its first weeks of operation, reducing congestion at the intersection and giving pedestrians safe crossing intervals. The experiment ended abruptly on January 2, 1869, when a gas leak caused the lantern to explode, injuring the police constable operating it. London authorities abandoned the device and made no further attempts at mechanical traffic control for decades. Electric traffic signals did not appear until 1912, when Lester Wire installed a system in Salt Lake City. The modern three-color traffic light, with the addition of yellow for caution, was patented by Garrett Morgan in 1923. Knight's gas-lit pioneer had lasted just 23 days.

Theodore Roosevelt became the first American to win the Nobel Peace Prize, awarded on December 10, 1906, for brokering the treaty that ended the Russo-Japanese War. The honor was deeply ironic for a president who had charged up San Juan Hill, expanded the Navy, and once declared that he wanted "no peace that comes at the price of dishonor." Roosevelt's mediation at Portsmouth, New Hampshire, in August 1905 stopped a war that threatened to destabilize East Asia and demonstrated that American diplomacy could match American military ambition. The Russo-Japanese War had begun in February 1904 when Japan launched a surprise attack on the Russian fleet at Port Arthur, Manchuria. Japan won a string of stunning victories on land and sea, including the decisive naval Battle of Tsushima in May 1905, where Admiral Togo destroyed the Russian Baltic Fleet. But Japan was financially exhausted, and Russia, though militarily humiliated, had vast reserves of manpower. Both sides needed a way out that preserved their dignity. Roosevelt offered to mediate, inviting delegations to the Portsmouth Naval Shipyard in Maine. The negotiations were tense. Japan demanded a war indemnity and control of Sakhalin Island. Russia refused to pay reparations and resisted territorial concessions. Roosevelt shuttled between the delegations, applying pressure, charm, and blunt warnings about the consequences of continued fighting. The Treaty of Portsmouth, signed on September 5, 1905, gave Japan control of Korea, the Liaodong Peninsula, and the southern half of Sakhalin, but no indemnity. The peace deal angered the Japanese public, who felt they had won the war but lost the peace. Anti-American riots erupted in Tokyo. Russia seethed at the territorial losses. Roosevelt's own view was characteristically blunt: both sides were "entirely selfish" and he had stopped the bleeding despite their stubbornness. The Nobel committee awarded him the prize for demonstrating that great power conflicts could be resolved through negotiation rather than attrition.