In the opening scene, why does Hiratsuka-sensei get held up by some policemen?
Maybe it's because of illegal parking at the bridge. If i remember it correctly, Hiratsuka sensei brought Hikigaya there to talk about the service club, i think it's between ep. 6-8, (because Hikigaya and Yukino had an argument/ misunderstanding) there was a sign that says parking is not allowed at the bridge.