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  2. Tow hitch - Wikipedia

    en.wikipedia.org/wiki/Tow_hitch

    The trailer tongue (North America) or coupling (outside North America) slips over a trailer hitch ball attached to a receiver hitch mount or integral with the hitch. A larger, heavy-duty gooseneck ball size: 3 in (76.2 mm) is typically used for towing greater than 10,000 pounds (4.5 t), and this towing capacity falls outside of the scope of SAE ...

  3. ISO standards for trailer connectors - Wikipedia

    en.wikipedia.org/wiki/ISO_standards_for_trailer...

    There are two main variants of the wiring with a switchover date 1999. The difference is that an additional connection for ground and that battery charging in the trailer is shared with other consumers. This means that if a pre-1999 camper trailer with a battery is connected to a post 1999 vehicle there's a risk that the battery charging won't ...

  4. Three-point hitch - Wikipedia

    en.wikipedia.org/wiki/Three-point_hitch

    The three-point hitch (British English: three-point linkage) is a widely used type of hitch for attaching ploughs and other implements to an agricultural or industrial tractor. [ 1 ] [ 2 ] The three points resemble either a triangle, or the letter A.

  5. Trailer connectors in Australia - Wikipedia

    en.wikipedia.org/wiki/Trailer_connectors_in...

    Round 7-pin trailer connector Type 1, Australian Standard 2513. In this pinout for an ISO 1724 connector, the position light pin is used for electric brakes (Pin 5, 58R), which means that if you connect a trailer with electric brakes to a towing vehicle wired according to ISO 1724 and turn on the position lights the trailer will be braking.

  6. Traffic barrier - Wikipedia

    en.wikipedia.org/wiki/Traffic_barrier

    Traffic barrier with a pedestrian guardrail behind it. Traffic barriers (known in North America as guardrails or guard rails, [1] in Britain as crash barriers, [2] and in auto racing as Armco barriers [3]) keep vehicles within their roadway and prevent them from colliding with dangerous obstacles such as boulders, sign supports, trees, bridge abutments, buildings, walls, and large storm drains ...

  7. Interlocking - Wikipedia

    en.wikipedia.org/wiki/Interlocking

    Railway interlocking is of British origin, where numerous patents were granted. In June 1856, John Saxby received the first patent for interlocking switches and signals. [2] [3]: 23–24 In 1868, Saxby (of Saxby & Farmer) [4] was awarded a patent for what is known today in North America as “preliminary latch locking”.

  8. Fifth-wheel coupling - Wikipedia

    en.wikipedia.org/wiki/Fifth-wheel_coupling

    The coupling consists of a kingpin, a 2-or-3 + 1 ⁄ 2-inch-diameter (50.8 or 88.9 mm) vertical steel pin protruding from the bottom of the front of the semi-trailer, and a horseshoe-shaped coupling device called a fifth wheel on the rear of the towing vehicle. As the connected truck turns, the downward-facing surface of the semi-trailer (with ...

  9. Cable barrier - Wikipedia

    en.wikipedia.org/wiki/Cable_barrier

    Given these relatively large deflections, cable barrier systems are not usually considered appropriate to shield fixed objects closer than 8 ft (2.4 metres) offset of the travelled way. Even when the available clearance exceeds 8 ft (2.4 metres), the public seems to have a greater level of confidence in a more robust barrier.

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