A filter in turn is a type of traffic junction found in the Channel Islands. The basic concept is that vehicles are required to take turns to go through the junction. Filter in turn junctions take slightly different forms across the island.
Due to a signage change in Jersey, both islands now use the same sign to indicate a filter in turn. [1]
In Jersey, there are five filter in turns.
The first is a roundabout in Beaumont where traffic must take turns to move round the roundabout rather than the regular system of Give Way to the right.
Three of the junctions are on the St Helier ring road and were introduced in 2012. [2] They are effectively merge in turn junctions at various gyratories on the system. They were introduced to improve road safety.
The final filter in turn is located at the end of Victoria Avenue. Traffic in both lanes where the dual carriageway reduces to a single carriageway must take it in turns to merge into the new lane in conditions of heavy traffic. These are accompanied by signs telling road users to use both lanes. This system exists to prevent the build-up of traffic during peak traffic times.
In Guernsey, filter in turn junctions are more common than in Jersey and are used in a variety of road situations. This is because (unlike Jersey) Guernsey has no road classification system, and traffic speeds tend to be lower, so roads more often have equal priority. Guernsey often uses box junctions at filter in turns to ensure traffic filtering does not block other traffic at peak times. [3] Unlike in Jersey, filter in turns have painted "FILTER" markings on the road.
While a formal filter-in-turn road rule does not exist elsewhere, road users in other countries may spontaneously adopt a similar arrangement from time to time at merge junctions where traffic is slow-moving and roughly equally heavy on both roads, even where one road has legal priority. A similar junction, known as an all-way stop, is common in North America and South Africa, where the vehicle that stops first proceeds first. In some parts of Mexico, there are intersections where vehicles must take turns to proceed. Depending on the region, they're known as either "uno y uno", "ceda el paso a un vehiculo [4] ", "X altos" (where X is the number of approaches), or "alto de cortesia". Unlike an all-way stop, vehicles are not always required to make a complete stop. Pedestrians generally have the right of way over vehicles.
Traffic comprises pedestrians, vehicles, ridden or herded animals, trains, and other conveyances that use public ways (roads/sidewalks) for travel and transportation.
A roundabout, a rotary and a traffic circle are types of circular intersection or junction in which road traffic is permitted to flow in one direction around a central island, and priority is typically given to traffic already in the junction.
An intersection or an at-grade junction is a junction where two or more roads converge, diverge, meet or cross at the same height, as opposed to an interchange, which uses bridges or tunnels to separate different roads. Major intersections are often delineated by gores and may be classified by road segments, traffic controls and lane design.
Priority traffic signs indicate the order in which vehicles shall pass intersection points. Vehicles often come into conflict with other vehicles and pedestrians because their intended courses of travel intersect, and thus interfere with each other's routes. The general principle that establishes who has the right to go first is called "right of way" or "priority". It establishes who has the right to use the conflicting part of the road and who has to wait until the other does so. The vehicle that does not need to wait is said to "have the right of way" or to "have priority."
Road signs in the United Kingdom and in its associated Crown dependencies and overseas territories conform broadly to European design norms, though a number of signs are unique: direction signs omit European route numbers, and road signs generally use the metric system of units which is kilometers and are generally used as distance indicators in the UK. Signs in Wales and parts of Scotland are bilingual.
Road signs in Singapore closely follow those laid down in the traffic sign regulations used in the United Kingdom, although a number of changes over the years have introduced some slight deviations that suit local road conditions. Road signs in Singapore conform to the local Highway Code under the authority of Singapore Traffic Police.
An all-way stop – also known as a four-way stop – is a traffic management system which requires vehicles on all the approaches to a road intersection to stop at the intersection before proceeding through it. Designed for use at low traffic-volume locations, the arrangement is common in the United States, Canada, Mexico, South Africa, and Liberia, as well as in a number of, usually rural, locations in Australia where visibility on the junction approaches is particularly poor. The stop signs at such intersections may be supplemented with additional plates stating the number of approaches.
A seagull intersection or continuous green T-intersection is a type of three-way road intersection, usually used on high traffic volume roads and dual carriageways. This form of intersection is popular in Australia and New Zealand, and sometimes used in the United States and other countries.
Road signs in South Korea are regulated by the Korean Road Traffic Authority.
Road signs in New Zealand are similar to those set by the Vienna Convention on Road Signs and Signals. While New Zealand is not a signatory to the convention, its road signs are generally close in shape and function. New Zealand uses yellow diamond-shaped signs for warnings in common with Australia, the Americas, Ireland, Japan and Thailand. Speed limit signs are a red circle with a white background and the limitation in black, and are in kilometres per hour. There are also some signs unique to New Zealand. Road signs in New Zealand are controlled by NZ Transport Agency Waka Kotahi and are prescribed in the Land Transport Rule: Traffic Control Devices 2004 and set out in the Traffic Control Devices (TCD) Manual.
Road signs in Mauritius are standardised traffic signs used in Mauritius according to the Traffic Signs Regulations 1990. They are heavily modelled on road signs in the United Kingdom, since Mauritius is a former British colony and drives on the left.
Road signs in Hong Kong are standardised by the Transport Department. Due to being a former British territory, the road signage in Hong Kong is similar to road signs in the United Kingdom, with the addition of Traditional Chinese characters.
A protected intersection or protected junction, also known as a Dutch-style junction, is a type of at-grade road junction in which cyclists and pedestrians are separated from cars. The primary aim of junction protection is to help pedestrians and cyclists be and feel safer at road junctions.
Terminology related to road transport—the transport of passengers or goods on paved routes between places—is diverse, with variation between dialects of English. There may also be regional differences within a single country, and some terms differ based on the side of the road traffic drives on. This glossary is an alphabetical listing of road transport terms.
Road signs in the Philippines are regulated and standardized by the Department of Public Works and Highways (DPWH). Most of the signs reflect minor influences from American and Australian signs but keep a design closer to the Vienna Convention on Road Signs and Signals, to which the Philippines is an original signatory. The Philippines signed the convention on November 8, 1968, and ratified it on December 27, 1973.
Road signs in South Africa are based on the SADC-Road Traffic Sign Manual, a document designed to harmonise traffic signs in member states of the Southern Africa Development Community. Most of these signs were in the preceding South African RTSM.
Road signs in Zambia are based on the SADC Road Traffic Signs Manual, a document designed to harmonise traffic signs in member states of the Southern Africa Development Community. Zambia drives on the left.
Road signs in Eswatini are based on the SADC Road Traffic Signs Manual, a document designed to harmonise traffic signs in member states of the Southern Africa Development Community. Eswatini drives on the left.
Road signs in Cyprus are regulated in Law of Street. They follow the road signs used in most European countries, including European Union countries, to which Cyprus joined in 2004, as set out in the Vienna Convention on Road Signs and Signals. Cyprus acceded to the Convention on 16 August 2016.