In this task, you're given a context passage. Your job is to generate relevant questions that can be answered by directly referring to the passage.
One example is below.
Q: Tracy slept awkwardly on their new bed and was having some pain, so Tracy cracked her neck.
A: What did Tracy do with her neck?
Rationale: The question asked is relevant and can be directly answered by referring to the phrase "so Tracy cracked her neck" from the passage.
Q: It is easy to see why motorcycles are appealing to a large number of people , old and young alike . These vehicles are great for heavy daily commutes because they are small and maneuverable , making it possible to weave in and out of traffic and split lanes to get ahead of the crush of cars that are otherwise stalled . This practice is not only legal , it is encouraged as a method of relieving congestion and getting at least a few motorists off the roads faster , hopefully cutting down of pollution as well .
A:
why are the cars all stalled ?