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  2. Built-up area (Highway Code) - Wikipedia

    en.wikipedia.org/wiki/Built-up_area_(Highway_Code)

    A 30 mph speed limit reminder road sign. Used when there is insufficient street lighting for a road to legally have an automatic 30 mph speed limit. In the UK Highway Code for England, Scotland and Northern Ireland, a built-up area is a settled area in which the speed limit of a road is automatically 30 mph (48 km/h). In Wales it's 20 mph (32 ...

  3. Automotive lighting - Wikipedia

    en.wikipedia.org/wiki/Automotive_lighting

    [23] [59] This usually takes the form of one green light on the dashboard on cars from the 1950s or older, or two green indicator lights on cars from the 1960s to the present, and a rhythmic ticking sound generated electromechanically or electronically by the flasher. It is also required that the vehicle operator be alerted by much faster- or ...

  4. Speed limits in the United States by jurisdiction - Wikipedia

    en.wikipedia.org/wiki/Speed_limits_in_the_United...

    A non-numeric minimum speed limit is incorporated with the basic speed rule in Arizona, which also prohibits speeds higher than would be "reasonable and prudent". [10] Night speed limit signs are posted on some roads within Tucson city limits that do not have street lights.

  5. Street light - Wikipedia

    en.wikipedia.org/wiki/Street_light

    A street light, light pole, ... so driving time and distance under impaired vision ... To prevent the dangers caused by a car driving through a pool of light, a ...

  6. Warning triangle - Wikipedia

    en.wikipedia.org/wiki/Warning_triangle

    According to § 15 StVO, a stranded vehicle must be secured with a warning triangle at a sufficient distance, whereby the law orders a minimum distance of 100 metres in the case of fast traffic, such as motorways. This applies not only to the driver of broken-down vehicles, but also the rescue service that stops and offers help.

  7. Road signs in Poland - Wikipedia

    en.wikipedia.org/wiki/Road_signs_in_Poland

    T-32 "plate indicating minimum distance between vehicles" T-33 "plate indicating fire extinguisher and emergency telephone in the lay by" T-34 "plate indicating electronic toll payment for using a public road"

  8. Traffic signal preemption - Wikipedia

    en.wikipedia.org/wiki/Traffic_signal_preemption

    Traffic signal preemption (also called traffic signal prioritisation) is a system that allows an operator to override the normal operation of traffic lights.The most common use of these systems manipulates traffic signals in the path of an emergency vehicle, halting conflicting traffic and allowing the emergency vehicle right-of-way, thereby reducing response times and enhancing traffic safety.

  9. Two-second rule - Wikipedia

    en.wikipedia.org/wiki/Two-second_rule

    The three second rule is a time for the defensive driver to judge the minimum safe trailing distance to help avoid collisions under ideal driving conditions. The red car's driver picks a tree to judge a two-second safety buffer. The two-second rule is a rule of thumb by which a driver may maintain a safe trailing distance at any speed.