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  2. Yellow line (road marking) - Wikipedia

    en.wikipedia.org/wiki/Yellow_line_(road_marking)

    A double yellow center line in the United States indicates that passing is prohibited California (foreground) paints a black line to help drivers see a double yellow line, while Nevada (background) does not. A yellow line (solid or dashed) indicates that crossing the line will place a driver in a lane where opposing traffic is coming at the driver.

  3. Road surface marking - Wikipedia

    en.wikipedia.org/wiki/Road_surface_marking

    Lanes with double broken yellow lines on each side are reversible, [52] and lane control signals are used to indicate which direction traffic in such lanes is supposed to travel. The solid white line on the right side is called the ' fog line ' used to help cars stay in their lane during foggy conditions and help pedestrians stay off the road.

  4. Prohibitory traffic sign - Wikipedia

    en.wikipedia.org/wiki/Prohibitory_traffic_sign

    Overtaking is prohibited either for all vehicles or for certain kinds of vehicles only (e.g. lorries, motorcycles). In the USA, this is usually phrased as "no passing zone" and indicated by a rectangular, black-on-white sign on the right side of the road that says "DO NOT PASS", and/or by a solid yellow line painted on the roadway marking the left limit of traffic (centerline), and sometimes ...

  5. Driving in the United States - Wikipedia

    en.wikipedia.org/wiki/Driving_in_the_United_States

    This should only be done in a legal passing zone, designated by either a dashed yellow center-line (indicating that passing is legal in both directions) or a solid line paired with a dashed line (indicating that passing is only legal for traffic adjacent to the broken line). A solid double yellow line indicates that passing is illegal in both ...

  6. Overtaking - Wikipedia

    en.wikipedia.org/wiki/Overtaking

    In some jurisdictions, the "overtaking zone" is indicated by a single broken centerline (yellow or white in most countries) if overtaking is allowed in either direction, or paired with a single solid line beside it to indicate there is no overtaking from the solid side.

  7. Traffic warning sign - Wikipedia

    en.wikipedia.org/wiki/Traffic_warning_sign

    Vienna Convention carriageway narrows sign (yellow diamond) These signs indicate when a multilane highway is being narrowed, when a passing lane is ending, or where the road is widening or a passing lane starting. Another type of sign is used to indicate central "two-way" left turning lane in center of roadway.

  8. Raised pavement marker - Wikipedia

    en.wikipedia.org/wiki/Raised_pavement_marker

    White and red or yellow and red — white or yellow for normal use in one direction, and red to indicate "do not enter" or "wrong way" in the other direction. White and black — white for marking lane restrictions in one direction on a roadway that has "reversible" traffic flow, and black in the other direction when the markings do not apply.

  9. Variations in traffic light operation - Wikipedia

    en.wikipedia.org/wiki/Variations_in_traffic...

    Traffic lights in Greece, Italy and Sweden used to show a green and yellow light together, to indicate that the light was about to change to red. [34] All countries now officially use a single yellow light instead, as displaying both the yellow and the green lights is in violation of the Vienna Convention on Road Signs and Signals.