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  2. Braking distance - Wikipedia

    en.wikipedia.org/wiki/Braking_distance

    Braking distance refers to the distance a vehicle will travel from the point when its brakes are fully applied to when it comes to a complete stop. It is primarily affected by the original speed of the vehicle and the coefficient of friction between the tires and the road surface, [Note 1] and negligibly by the tires' rolling resistance and vehicle's air drag.

  3. Stopping sight distance - Wikipedia

    en.wikipedia.org/wiki/Stopping_sight_distance

    Stopping sight distance is one of several types of sight distance used in road design. It is a near worst-case distance a vehicle driver needs to be able to see in order to have room to stop before colliding with something in the roadway, such as a pedestrian in a crosswalk, a stopped vehicle, or road debris .

  4. Brake force - Wikipedia

    en.wikipedia.org/wiki/Brake_force

    British Railway Class 90 infobox showing brake force Brake force to weight ratio of the Class 67 is higher than some other locomotives. In the case of railways, it is important that staff are aware of the brake force of a train so sufficient brake power will be available to bring the train to a halt within the required distance from a given speed.

  5. HAWK beacon - Wikipedia

    en.wikipedia.org/wiki/HAWK_beacon

    A HAWK beacon (high-intensity activated crosswalk beacon) is a traffic control device used to stop road traffic and allow pedestrians to cross safely. It is officially known as a pedestrian hybrid beacon. The purpose of a HAWK beacon is to allow protected pedestrian crossings, stopping vehicular traffic only

  6. Assured clear distance ahead - Wikipedia

    en.wikipedia.org/wiki/Assured_Clear_Distance_Ahead

    The time to traverse your stopping distance at travel speed should not be confused with the braking time to come to a full stop, which is a number nearly twice this value ( t= ⁠ v / μ g ⁠ +t ptr). As one is continually slowing down while braking, it will naturally take longer to get to the stopping limit.

  7. A pink powder is being used to fight California fires. It's ...

    www.aol.com/pink-powder-being-used-fight...

    The following year, a US District judge agreed with the employees, but in her ruling allowed the Forest Service to continue using the retardant as it seeks a permit to do so from the US ...

  8. Do you stop in an intersection to make a left turn? Here’s ...

    www.aol.com/stop-intersection-left-turn-why...

    In the section on traffic signals, the law says that drivers facing a green signal who want to turn “shall stop to allow other vehicles within the intersection control area to complete their ...

  9. Frequency selective surface - Wikipedia

    en.wikipedia.org/wiki/Frequency_selective_surface

    The FSS sheet may be represented in terms of lumped RLC networks placed in parallel across the transmission line. The shunt admittance FSS model is exact only for an infinitesimally thin FSS, for which the tangential electric field is continuous across the FSS; for finite thickness FSS, a tee or pi network can be used as a better approximation.