Final answer:
The question pertains to the required safety equipment that motor vehicles and trailers must legally have, such as lighting, mirrors, seat belts, and other features to ensure road safety and legal compliance.
Step-by-step explanation:
The question 'Every motor vehicle, trailer, semi-trailer, and pole trailer must have....' refers to the legal requirements for vehicles in terms of equipment and safety features. In many jurisdictions, motor vehicles, including trailers, semi-trailers, and pole trailers, are required by law to have certain safety equipment. These typically include items such as lights (headlights, taillights, brake lights, and turn signals), mirrors, windshields with wipers, seat belts, and in some areas, emissions control devices.
In addition, there might be requirements for reflective markings, a horn, and a muffler. Requirements can vary by region, so it's important to check local laws for the specific items that are mandated. For trailers, regulations often insist on safety chains, proper tie-downs for cargo, and functional brake systems, especially for larger trailers.
Ensuring that a vehicle is properly equipped is crucial for road safety and compliance with the law. These regulations are designed to protect drivers, passengers, and pedestrians.