When are clearance lights required by state law for trucks or buses?

Clearance lights are essential safety features that help indicate the overall width of a vehicle, especially larger ones such as trucks and buses. Texas law mandates that clearance lights are required when the width of these vehicles is 80 inches or more. This requirement is in place to enhance visibility and safety on the road, as larger vehicles can be more challenging to see, especially in low light conditions. The presence of clearance lights helps other drivers gauge the vehicle's dimensions from a distance, reducing the risk of accidents.

In this context, the other options do not meet the legal width requirement for clearance lights in Texas. Therefore, the correct choice accurately reflects the state law regarding when clearance lights must be installed on trucks or buses based on their width.