Cliftonville Curve is a short railway that links the West Coastway Line to the Brighton Main Line between Hove and Preston Park. It was opened in July 1879. The curve includes a tunnel.
The line, which is also known as the Cliftonville Spur, was named in reference to Cliftonville station (now called ) which had opened in 1865. Cliftonville was an area of Hove which was developed speculatively as a "fashionable neighbourhood" in the mid-19th century. Construction of the curve allowed trains to travel between the Brighton Main Line and the West Coastway Line without having to reverse at , reducing congestion there and shortening journeys.