Which of the following actions is commonly restricted under a conditional driver's license?

A conditional driver's license is often issued to individuals who may have had their regular license suspended or revoked for various reasons, such as infractions or legal issues. The primary purpose of this conditional license is to allow limited driving privileges under certain circumstances while ensuring safety and adherence to regulations.

Driving during nighttime is commonly restricted under a conditional driver's license. This limitation addresses safety concerns, especially for new or inexperienced drivers who may struggle with nighttime visibility and hazards. By prohibiting driving after dark, regulatory bodies aim to reduce the risk of accidents and enhance the driver's skills in safer conditions.

The other options, while they might be relevant restrictions in some cases, are not universally standard like the nighttime driving limitation. Each jurisdiction may have different rules regarding family members, vehicle size, or city driving, making them less predictable as common conditions of a conditional license.