While SR 9 is mainly used as a state designation for Interstate 95 in Florida from the Golden Glades Interchange in Miami Gardens to the Georgia border (near Yulee, Florida), a signed SR 9, which is locally known in the Miami area as West 27th Avenue, Unity Boulevard, and historically Grapeland Boulevard, extends 13 miles (21 km)[1] from the Coconut Grove section of Miami to the Golden Glades Interchange (where the unsigned portion continues northward along I-95).

Southwest 27th Avenue begins locally at Bayshore Drive in the Coconut Grove neighborhood in Miami.

While in Brownsville, Miami's Metrorail splits the street in two, with two lanes running in either direction on both sides of the track.

The section of SR 9 northeast into the Golden Glades Interchange was planned before the Interstate Highway System as a bypass to US 1.

It is the FDOT designation of Interstate 95 from its junction with SR 9 in North Miami Beach to the freeway's southern terminus at US 1.