The line runs from Hunts Cross in the south of Liverpool towards Liverpool Central. Brunswick station between and Liverpool Central was added in 1998 to provide a connection to the Brunswick Business Park. In the tunnel just south of Liverpool Central, the line drops into a 1970s tunnel to a lower level into the underground Mersey Railway Liverpool Central (Low Level) station. North of Central the line uses the Mersey Railway tunnel for about half of the route to Moorfields, an underground station built in the 1970s to replace the surface-level Liverpool Exchange. North of Moorfields, the route emerges from the tunnel to join the Lancashire and Yorkshire Railway lines from the former Exchange station.