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Red lights supplement stop signs on the side road approaches. All-way red flashing lights can supplement all-way stop control, but all-way yellow signals are prohibited by US regulations. In Canada a flashing yellow light at an intersection that would otherwise have traffic signals indicates that the traffic signals are malfunctioning.
In the US, a single-aspect flashing amber signal can be used to raise attention to a warning sign and a single-aspect flashing red signal can be used to raise attention to a "stop", "do not enter", or "wrong way" sign. [32] Flashing red or amber lights, known as intersection control beacons, are used to reinforce stop signs at intersections. [33]
Stop on red - yield on flashing red after stop. R10-24 Bicycle push button for green light. R10-25 ... Light rail activated sign . W10-8 Trains may exceed XX mph. W10-9
A yellow light indicates that a red light will follow, and vehicle drivers must stop if it is safe to do so. Flashing beacons are flashing signals. Yellow flashing beacons are usually used to draw attention to other traffic control devices, such as a crosswalk sign. Red flashing beacons are used to supplement stop signs.
This sign was created with Inkscape. Public domain Public domain false false This file is in the public domain because it comes from the Manual on Uniform Traffic Control Devices , which states specifically on page I-1 that :
The stop sign is retroreflective and equipped either with red blinking lights above and below the stop legend or with a legend that is illuminated by LEDs. Unlike a normal stop sign, this sign indicates a two-way absolute stop, requiring other vehicles travelling in both directions to remain stopped until the sign is retracted. [citation needed]
At moveable bridges, which must be treated as stop and stay. The MUTCD states if two horizontally aligned red signal indications are used on an approach for an intersection control beacon, they shall be flashed simultaneously to avoid being confused with grade crossing flashing-light signals (e.g. railroad crossings).
In the U.S., Stop and speed limit signs fall under the R Series (Regulatory). Modern U.S. signs are widely standardized; unless they are antique holdovers from an earlier era, oddities like a yellow Stop sign or a red Slippery When Wet sign would typically appear only on private property—perhaps at a hospital campus or in a shopping mall ...