Is this grammatically correct? What does it mean? Any possible rephrasing? Traveling at the dead of the night is so scary

Yes, the sentence is grammatically correct. It means that traveling in the late hours of the night, when it is very dark and quiet, can be a frightening experience. Possible rephrasing could include: - "Traveling in the middle of the night is quite terrifying." - "Traveling during the darkest hours of the night is very scary." - "Traveling late at night can be quite frightening."