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  2. Trafficators - Wikipedia

    en.wikipedia.org/wiki/Trafficators

    The shape of the trafficator arm is closely based upon the shape of the semaphore signal arm used by the Royal Bavarian State Railways beginning in 1890. The shape differs in that the trafficator has only the lower 'blade' of the rail signal's terminal 'arrowhead', so that the retracted trafficator sits flush with the vehicle's exterior.

  3. Automotive navigation system - Wikipedia

    en.wikipedia.org/wiki/Automotive_navigation_system

    An automotive navigation system is part of the automobile controls or a third party add-on used to find direction in an automobile. It typically uses a satellite navigation device to get its position data which is then correlated to a position on a road.

  4. Road traffic control device - Wikipedia

    en.wikipedia.org/wiki/Road_traffic_control_device

    The red light means that the vehicle facing the traffic light must come to a complete stop. A green light means that the vehicle facing the traffic light may proceed when it is safe to do so. 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.

  5. List of sirens built by Alerting Communicators of America

    en.wikipedia.org/wiki/List_of_sirens_built_by...

    Alert and Attack (Wail). A third signal was also available, Yelp, which required a special type of motor and used a reversing magnetic starter. Early models used a gear driven rotator, which was changed to a chain drive rotator by 1970. Alpha Cyclone 120: Electro-Mechanical 40-50 8/12 1968-1970 Omni Directional 120 dB at 100 ft.

  6. Road signs in the United States - Wikipedia

    en.wikipedia.org/wiki/Road_signs_in_the_United...

    11th edition of the MUTCD, published December 2023. In the United States, road signs are, for the most part, standardized by federal regulations, most notably in the Manual on Uniform Traffic Control Devices (MUTCD) and its companion volume the Standard Highway Signs (SHS).

  7. Direction finding - Wikipedia

    en.wikipedia.org/wiki/Direction_finding

    The resulting signal is processed and produces an audio tone. The phase of that audio tone, compared to the antenna rotation, depends on the direction of the signal. Doppler RDF systems have widely replaced the huff-duff system for location of fleeting signals.

  8. Automotive lighting - Wikipedia

    en.wikipedia.org/wiki/Automotive_lighting

    The emergency stop signal is automatically activated if the vehicle speed is greater than 50 km/h (31 mph) and the emergency braking logic defined by regulation No. 13 (heavy vehicles), 13H (light vehicles), or 78 (motorcycles) is activated; the ESS may be displayed when a light vehicle's deceleration is greater than 6 m/s 2 (20 ft/s 2) or a ...

  9. Traffic sign design - Wikipedia

    en.wikipedia.org/wiki/Traffic_sign_design

    In the United States, the Manual on Uniform Traffic Control Devices (MUTCD) sets standard shapes and designs for signs throughout the United States to ensure that they are consistent. The Convention on Road Signs and Signals , commonly known as the Vienna Convention on Road Signs and Signals , is a multilateral treaty to standardize the signing ...