Cycle lanes are marked on the carriageway. There are two types:
the mandatory cycle lane (with a solid white line) supported by a traffic regulation order, which prohibit the use of the lane by motor vehicles during its hours of operation and can prohibit parking; and
the advisory cycle lane (with a broken white line), which while not prohibiting entry by motor vehicles can be useful in giving space to cyclists at places where the carriageway may be too narrow to safely accommodate a mandatory lane.
As with any section of carriageway, parking in cycle lanes may be prohibited by yellow line restrictions subject to a traffic regulation order made under the Road Traffic Regulation Act 1984.