In public transport, a request stop, flag stop, or whistle stop describes a stop or station at which trains or buses stop only on request; that is, only if there are passengers to be picked up or dropped off. In this way, ill-frequented stops can be incorporated into a route without introducing unnecessary delay.

Vehicles may also save fuel by continuing through a station when there is no need to stop.

There may not always be a significant savings on time if there is no one to pick up because vehicles going past a request stop may need to slow down enough to be able to stop if there are passengers waiting. Request stops may also introduce extra travel time variability and increase the need for schedule padding.

Implementations

The methods by which transit vehicles are notified that there are passengers waiting to be picked up at a request stop vary by transit system and by route.

Local transport

Most local, inner-city bus operations operate almost all of their stops as request stops, even if there is almost always a passenger boarding or alighting. To distinguish stops that are served on every trip, these are usually called stations and they are most often at the terminals of a route. Such stops are often also used as timepoints.

A flag is a piece of fabric (most often rectangular or quadrilateral) with a distinctive design that is used as a symbol, as a signaling device, or as decoration. The term flag is also used to refer to the graphic design employed, and flags have since evolved into a general tool for rudimentary signalling and identification, especially in environments where communication is similarly challenging (such as the maritime environment where semaphore is used). National flags are potent patriotic symbols with varied wide-ranging interpretations, often including strong military associations due to their original and ongoing military uses. Flags are also used in messaging, advertising, or for other decorative purposes. The study of flags is known as vexillology, from the Latin word vexillum, meaning flag or banner.

Due to the use of flags by military units, "flag" is also used as the name of some military units. A flag (Arabic: لواء) is equivalent to a brigade in Arab countries, and in Spain, a flag (Spanish: bandera) is a battalion-equivalent in the Spanish Legion.

A flag is a colored cloth with a specified meaning.

Flag may also refer to:

Art and entertainment

Biology

Flag is the common name of several genera or species of flowering plants:

A flag is a device used in lighting for motion picture and still photography to block light. It can be used to cast a shadow, provide negative fill, or protect the lens from a flare. Its usage is generally dictated by the director of photography, but the responsibility for placing them can vary by region, usually devolving to either the gaffer and electricians or the key grip and lighting grips.

Flags come in a wide variety of shapes and sizes, from mere square inches ("dots and fingers") to many square feet ("meat axes"). Most "industry-standard" flags consist of a square wire frame stitched with black duvetyne, which minimizes any reflected light and keeps the flag lightweight. Flags are distinguished from larger light-cutting tools such as overhead rigs or butterflies in that they can be mounted on individual C-stands, as opposed to being affixed to collapsible frames.

The above notwithstanding, given smaller budgets or extenuating circumstances, virtually any opaque object can be used to flag light.

Stop may refer to:

Film

Music

Albums

Songs

In geometry, the octagrammic prism is one of an infinite set of nonconvex prisms formed by square sides and two regular star polygon caps, in this case two octagrams.

Stop (Serbian: Стоп) is a village in the municipality of Rogatica, Republika Srpska, Bosnia and Herzegovina.

References

Coordinates: 42°40′N 18°30′E / 42.667°N 18.500°E / 42.667; 18.500