![]() Soldier's Field Road in Brighton, Massachusetts at the intersection with Nonantum Road, Birmingham Parkway and North Beacon Streets always has a red ball. This allows pedestrians to engage into the roadway, and therefore (in theory) increases safety. In the Province of Quebec, a signal may display a green straight arrow alone, usually for 5 to 9 seconds, and then the full green (or right turn arrow) illuminates. The meaning of this configuration is that a motorist may only proceed in the direction of the arrow. Some signals have a special phase where there is a red light illuminated simultaneously with a green arrow. See also: Right turn on red Turn prohibition Unusual traffic light phases Turn indications ![]() The new US 2009 Manual on Uniform Traffic Control Devices specifically prohibits flashing any green signal indication. This functions the same as a European "priority" sign (a yellow-and-white diamond shaped sign indicating that the current street is a Priority or "main" road, which cross streets must yield to at uncontrolled junctions, opposite to the usual arrangement in many European countries), for which there is no direct equivalent in North America. In other parts of the same country ( e.g., Vancouver) a flashing green light conveys a very different meaning: the crossing road has stop signs with no lights of its own, and oncoming traffic also has a flashing green, not a red stop-light. At some intersections in Winnipeg, Manitoba, a flashing green right-turn arrow appears with a red light when traffic from the right has a green flashing left-turn arrow and is not allowed to make a U-turn. At least one traffic light in Montreal (on the Island of Montreal, 'Right-on-Red' is not allowed), has a flashing right-turn arrow, indicating that the pedestrian crossing has a red light, so it is safe to turn right and drive across it. The flashing light may be a "full" green, or a green left arrow, both meaning the same thing. Similarly, a flashing green may be an Extended Green, for left turns after the opposing traffic's full green phase. In some parts of Canada, a flashing green (known as Advanced Green) light signals permission for a left turn before the opposing traffic is allowed to enter the intersection, i.e., oncoming traffic is facing a RED light. In New Zealand, paired red/red traffic lights are often installed outside Fire and Ambulance Stations on major roads, which when activated by the station, flash alternatively (so that at any time one red light is always showing), the purpose being to cause to traffic to stop for a set amount of time to allow emergency vehicles to exit their station safely. All-way red flashing lights can supplement all-way stop control, but all-way yellow beacons are prohibited by United States regulations. ![]() Red lights supplement stop signs on the side road approaches. Yellow lights are displayed to the main road, to highlight the intersection and inform drivers of the need for caution. A single four-way flashing light showing only one color in each direction may be used at intersections where full three-color operation is not needed, but stop or yield signs alone have not had acceptable safety performance. ![]() This may be used when there is a malfunction with the signals, or late at night when there is little traffic. In the United States and Australia, flashing yellow does not require traffic to stop, but drivers should exercise caution since opposing traffic may enter the intersection after stopping. ![]() In the United States, a flashing red light is the equivalent of a stop sign. 2.1.3.3 Flashing red ball, yellow ball, or red arrow. ![]()
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