Farm to Market Road 511 (
FM 511) is located in
Cameron County. It runs from
FM 3248 on the northeast side of
Brownsville southeast and southward to the city's southern sections. The highway forms an outer loop/bypass of the main portion of Brownsville. It is known locally and is signed as the
Senator Eddie Lucio Jr. Highway. FM 511 was originally designated on July 3, 1945, from
US 83 in Olmito to
SH 4 near the Port of Brownsville. On September 9, 1947, it was extended on the north side to include a section to
US 281 near Olmito, and on the south side to extend southward and westward into Brownsville. On November 23, 1948, it was extended to SH 4 in Brownsville. On October 7, 1949, the section south of
FM 1419 was transferred to FM 1419. On January 29, 1957, this section west of Olmito was renumbered
FM 1732. On August 26, 1969, FM 511 was relocated at Port of Brownsville. The highway formerly extended northwest to
I-69E and
US 77/
US 83 at
Olmito, but this portion was expanded starting in 2008 and was transferred to
SH 550. The section from FM 3248 south to
SH 48 was a part of this expansion, becoming a four-lane highway with center turning lane. This project began in January 2008 and was completed late in 2010. On June 27, 1995, the section from FM 3248 to FM 1419 was designated
Urban Road 511 (
UR 511). The designation reverted to FM 511 with the elimination of the Urban Road system on November 15, 2018. ==FM 512==