Yellow lines are road markings used in various territories.
A single yellow line is a road marking that is present on the side of the carriageway in the United Kingdom. It indicates that parking or waiting at that roadside is prohibited at certain times of day. The exact times vary by area and are indicated by signs at the roadside. Stopping to load and to pick up or set down passengers is generally allowed unless additional restrictions apply.
Countries formerly part of the British Empire are likely to retain a modified version of the British laws including the basic principles regarding road safety. In Malta for example, a single yellow line, means no waiting (i.e. no parking, but alighting of passengers is permitted). The sign is applicable all day.
In New South Wales, Australia- single yellow lines indicate a clear way, where parking is strictly prohibited during certain times of the day and/or special events. Single yellow lines are also used in areas with high snow fall to mark the far left side of the road.
In Malaysia, single yellow line is used in most roads leading to cities or towns or busy areas to mark parking restriction for certain times.
In France, Lebanon, and in some areas in the United States a single yellow line is used to separate traffic coming from opposite directions, where passing is allowed but with extreme caution.
Yellow road lines are used in the centre of the road in areas with large amounts of snow to contrast with the white colour of snow. These lines are white in areas where there is infrequent or no snow.
In Canada, a double yellow line in the centre of the road means that it is unsafe for traffic travelling in either direction to pass (overtake). This is usually found on rolling hills or through corners where visibility is limited.
In the province of British Columbia, it is against the law to touch or cross solid double yellow line at any time, except to avoid obstructions on the highway, or when a vehicle is entering or exiting the highway, if the vehicle can safely do so without affecting the flow of other vehicles.
Hong Kong is one of the regions outside the UK using double yellow lines on the side of carriageways.