Final answer:
When encountering a blockage in your lane on a multi-lane street, safely change lanes to avoid the blockage or wait for it to clear if changing lanes is not possible. Finding an alternate route is also an option.
Step-by-step explanation:
If you are traveling on a multi-lane street and the lane you are in is blocked ahead, the safest course of action would be to change lanes and avoid the blockage if it is safe to do so. It is essential to ensure that changing lanes can be done without causing further disruption or danger to yourself or others on the road. If changing lanes is not possible, you may need to wait for the blockage to clear or find an alternate route by either turning around (if safe and legal) or exiting the street. Always remember to keep a safe distance from the blocked area, adhere to traffic laws, and pay attention to traffic signals and road signs.