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Carré (two red lights, aligned either horizontally or vertically): stop. The carré orders the driver to stop and cannot be passed. It is a protection signal used to protect points, crossovers, stopping places etc.. Semaphore (one red light): stop. The semaphore orders a temporary halt, usually because the block it protects is engaged by ...
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]
The usual equipment of a marshaller is a reflective safety vest, a helmet with acoustic earmuffs, and gloves or marshalling wands – handheld illuminated beacons. At airports, the marshaller signals the pilot to keep turning, slow down, stop, and shut down engines, leading the aircraft to its parking stand or to the runway.
Build an intersection with long red lights and more drivers will race through on a yellow. Build a road with multiple 12-foot-wide lanes and generous shoulders, and then post a 25-mph speed limit ...
A US Navy crewman signals the letter 'U' using flag semaphore during an underway replenishment exercise (2005). Flag semaphore (from the Ancient Greek σῆμα (sêma) 'sign' and - φέρω (-phero) '-bearer' [1]) is a semaphore system conveying information at a distance by means of visual signals with hand-held flags, rods, disks, paddles, or occasionally bare or gloved hands.
When used in traffic, hand signals are often used to convey driver's intention of their next movement. In some countries, hand signals can apply to any vehicle whose signal lights are missing or damaged. Hand signals are commonly used and applies to cyclists and motorists. Hand signals are commonly used to signal a left turn, right turn ...
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