Which is a requirement for outside mirrors on vehicles built on a truck chassis?

For vehicles built on a truck chassis, it is mandated that there is one outside mirror on each side. This requirement is in place to enhance the visibility and safety of the vehicle on the road. Both mirrors provide the driver with critical views of the surroundings, including blind spots that are not covered by the interior rearview mirror. Having mirrors on both sides improves overall awareness of traffic conditions, pedestrians, and other obstacles, which is essential for safe operation.

The regulation reflects an understanding of the increased size and typically reduced maneuverability of truck chassis vehicles compared to standard passenger cars, making adequate rear visibility and side monitoring even more crucial. Ensuring that trucks have adequate side mirrors promotes safer driving practices and reduces the likelihood of accidents.