A hundred years of New York subway history:
Oct. 27, 1904: Subway opens at City Hall Park, with as many as 150,000 people each paying a nickel to ride a Manhattan line that stretched 9.1 miles.
1915: The privately owned Interborough Rapid Transit Company and Brooklyn Rapid Transit Company (later Brooklyn-Manhattan Transit Company) sign contracts to operate subway lines; service into Queens begins.
1918: With motormen on strike, a substitute operator loses control of a train on the Brighton Line in Brooklyn; the derailment kills 97 and injures 200.
1920: Automatic coin-operated turnstile is introduced on the Lexington Avenue line, eliminating the need for ticket attendants.
1932: City completes construction of Eighth Avenue line and creates the Independent Rapid Transit Railroad.
1940: Subway system is unified after city takes over the financially ailing private lines.
1953: Fares increase from 10 cents to 15 cents; tokens are introduced because turnstiles cannot accept both nickels and dimes.
1966: City is crippled by 12-day subway and bus strike. The Public Employees' Fair Employment Act is passed in 1967 as a result to prevent strikes of public employees.
1968: The state legislature creates the Metropolitan Transportation Authority to oversee commuter-rail operations in 12 counties in the city region.
1971: City buys a subsidiary of the Baltimore & Ohio Railroad and creates what would become the Staten Island Railway.
1980: After an 11-day walkout, the Transit Workers Union is fined more than $1 million for the strike, and workers are docked pay.
1991: Five passengers are killed and more than 200 injured when a No. 4 train derails after overrunning a switch near Union Square. The operator, who was drunk, is convicted of manslaughter and sentenced to 15 years imprisonment.
2003: A fare increase -- the 14th since the original nickel fare in 1904 -- raises the cost of a ride to its current $2. Coin tokens are taken out of service, replaced by the MetroCard.
2004: The MTA pushes ahead with its plan for a $16 billion Second Avenue line in Manhattan, slated for completion in 2011.