#1 and #5 are correct.Are these correct? If not, why? What do they mean?
1. When is the bridge closed?
5. Anyone know when the bridge is closed?
When a noun phrase begings with a question word, the word order of the noun phrase changes.
(Does) Anyone know [something]?
(Does) Anyone know [Question word + Noun phrase]?
(Does) Anyone know [Question word + Subject + Verb]?
(Does) Anyone know [when + the bridge + is closed]?