Pennsylvania's law on driving on roadways laned for traffic mandates that vehicles stay within their lanes unless safe to change, with specific rules for multi-lane roads and designated lanes. It also authorizes traffic-control devices to restrict lane use or prohibit lane changes. Drivers must obey these devices to ensure safety and proper traffic flow.
Drivers must stay within a single lane as much as practicable and only change lanes when it is safe to do so after checking for safety.
Yes, but only when overtaking, preparing for a left turn, or if the lane is designated for traffic moving in the same direction, and the lane is clear.
Yes, official traffic-control devices can restrict lane use to certain vehicle types or prohibit lane changes, which drivers must obey.
You must obey the signs and not change lanes in the restricted section of the roadway.