State Road 504 (SR 504), also known as the Flatbush Avenue Connector, is a two-lane divided freeway in Connecticut that runs 0.70 miles (1.13 km) within the city of Hartford.

The roadway runs northward alongside a creek as a two-lane divided freeway.

After 0.70 miles (1.13 km) through wooded suburban surroundings, the single northbound lane merges into eastbound I-84/US 6.

In 1963, however, the state proposed the corridor as the Cedar Ridge Connector with no number, leading from its current terminus at I-84 to U.S. 5/Route 15 in Wethersfield.

The latest plans for the region include completing the interchange, providing access to points west, and moving a ramp to eliminate the left exit.