Puerto Rico Highway 864 (PR-864) is an eastâÂÂwest road located in the municipality of Bayamón in Puerto Rico. Located south of PR-2, the entire road is located in Hato Tejas barrio and is in length. This route intersects with PR-2 at its eastern and western termini.
Puerto Rico Highway 864 has a single lane per direction in the entire length and provides access to several neighborhoods of the western area of Bayamón. It begins at PR-2 in western Hato Tejas barrio and heads to the east, where meets with PR-862. After PR-862 intersection, PR-864 continues to the east, passing through few neighborhoods until its end at PR-2 in eastern Hato Tejas.
Before its current numerical designation, the entire length of PR-864 belonged to an original segment of PR-2 prior to its current deviation and widening. The current numerical designation corresponds to the 1953 Puerto Rico highway renumbering, a process implemented by the Puerto Rico Department of Transportation and Public Works () that increased the insular highway network to connect existing routes with different locations around Puerto Rico.