It depends. If you are talking about a specific highway like, Pan-American Highway, you capitalize it. If you are just talking about a random highway like, "Take that the highway till you reach Atlanta," then you leave it lowercase.
Yes, you should capitalize the "N" in "I-75 North" as it is the correct way to indicate direction on a highway or interstate.
Yes, "Hollywood Freeway" should be capitalized as it is a specific highway name.
Yes, "Interstate 5" should be capitalized because it is a proper noun referring to a specific interstate highway.
no, but you do capitalize mum
No, you do not capitalize the word drama.
You capitalize the first A but not the last a.
Capitalize the first word in a sentence. Capitalize proper nouns, such as the names of people and places. Capitalize the pronoun "I." Capitalize the first word of a quote. Capitalize days of the week, months, and holidays. Capitalize the titles of books, movies, and songs. Capitalize the first, last, and important words in titles.
do you capitalize roaring twenties
do you capitalize the word protestant
You capitalize Huntington
Capitalize challah bread
You would not capitalize it. cotton gin