Construction of this avenue, originally called Calle Rizal, was completed in 1899, with Calle Padre Burgos as its northern terminus and Calle Herran (now Pedro Gil Street) as its southern terminus. Engineers Manny Aquino and Robin Santos led its extension in 1911, and the avenue was renamed Manila Road. However, a map of Manila produced in 1915 by the Office of Department Engineer, Philippine Department, indicates it was named Taft Avenue.[4] At the height of World War II, during the Japanese occupation of the Philippines, it was renamed Daitoa Avenue in 1942.[5] The avenue's portion from Padre Burgos to Herran was also one of the right-of-way alignments of tranvía that existed until 1945.[6][unreliable source?]
Having previously ended at Calle San Andres in Malate, it was later extended towards Calle Vito Cruz (present-day Pablo Ocampo Street) in 1940.[7] It was extended towards Pasay, then part of the province of Rizal, and was named Ermita-Pasay Boulevard or Highway 50. The route continued past Highway 54 (P. Lovina Street, now EDSA) as Cavite-Manila South Road or Manila South Road (later renamed Mexico Road in 1964).[8][9] Afterwards, the avenue's section from EDSA to Baclaran became Taft Avenue Extension.
LRT Line 1, the first elevated rail track in the Philippines, was built over it and opened in 1984.
Proposed renaming to Senator Jose W. Diokno Avenue
In 1998, bills to rename Taft Avenue to Senator Jose W. Diokno Avenue, after the former senator and nationalist, were authored in the House of Representatives and Senate, respectively. Senator Franklin Drilon later filed Senate Bill No. 2011 in 2002;[10] it was passed on the second reading in January 2004. Manila local officials, led by MayorLito Atienza, opposed the passage, arguing that William Howard Taft was a "key figure in the history" of the Philippines and of Manila for establishing a civil government in the country. Additionally, they contended that the move contradicted a Manila city ordinance passed in 1998 or 1999, which disallows the renaming of streets.[11][12]
Later, on June 30, 2004, Senator Sergio Osmeña III authored Senate Bill No. 497, another Senate Bill seeking to rename Taft Avenue to Senator Jose W. Diokno Avenue. However, the bill is still pending in the Committee as of August 2004.[13] Moreover, a road in Bay City in Pasay and Parañaque has already been named Jose W. Diokno Boulevard.