Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to pass safely on a two lane road [title] Look at traffic signals and lane markings to ensure passing is legal. [step] Check for signs indicating whether you're in a designated passing zone or non-passing zone. If you're unsure, look at the lane markers.

Ending1: These signs are located in front of most cars and indicate where drivers can pass if they become confused or stop. Read the signs carefully to ensure that you are driving safely and do not misrepresent the fact that a yellow light is present. Ending2: If you're only passing on one side or one lane, look for signs that tell you you're passing within " t " as indicated by numbers and letters. [title] Buy a sticker for any traffic cones in your area. Ending3: [substeps] A solid yellow line indicates it's unsafe to pass into oncoming traffic. A single dotted yellow line or a solid yellow line with a dotted line on your side of traffic indicates that it's a safe move. Ending4: [substeps] Passing has changed over the past few decades and some passes have changed 20 times. Check which crossing signals you should use, since traffic signals and lanes are always changing with these different passes.

Answer format: ending1/ending2/ending3/ending4