When is it safe to drive in a lane marked with dashed lines?

Driving in a lane marked with dashed lines is safe when changing lanes or merging because dashed lines indicate that lane changes are permitted. This visual cue allows drivers to assess the surrounding traffic and make safe maneuvers to switch lanes. The presence of dashed lines suggests that the lane is intended for transitioning from one lane to another, making it an appropriate action when done carefully.

In contrast, construction signs indicate that special caution is necessary, and the lanes may not be safe for regular use. Night driving does not inherently affect the rules around dashed lines; safe lane changes can occur at any time when visibility permits. Driving in a lane marked with dashed lines when no other cars are present is less relevant, as the safety of a lane change should always consider the overall traffic conditions, not just the absence of vehicles.