Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to get through a dui checkpoint [title] Avoid the checkpoint if possible. [step] You aren't legally required to go through a checkpoint if you see one up ahead. Instead, you can pull onto a side road or do a u-turn, if legal.

Ending1: Otherwise, you can drive behind the vehicle to a safe spot. [title] Give the driver behind you a thumbs-up. Ending2: You shouldn't jeopardize the drive if there is an obstruction, for example. [substeps] If you drive with an obstruction in mind, always call emergency services or even 911. Ending3: [substeps] There's no need to pull over until you do see a checkpoint. Instead, stop at a green light or stop early. Ending4: [substeps] Don't break the law to avoid the checkpoint. For example, you must use proper turn signals, drive at a safe speed, and observe all other traffic laws.

Answer format: ending1/ending2/ending3/ending4