No, unless it is the first word in a sentence, or part of a title, such as The Weather Channel.
All of them should be capitalized if they are at the beginning of a sentence. Drive, River, and Railroad would also be capitalized if they are part of proper nouns such as South Drive, Mississippi River, Edaville Railroad.
Have should be capitalized if it is the beginning of a sentence. Summer should not be capitalized.
Yes it should be capitalized.
No. It should not be capitalized.
It should only be capitalized if it forms part of a title.
Yes, it should be capitalized.
The first 'c' should be capitalized.
Yes it should be capitalized.
Yes it should always be capitalized.
As an abbreviation it should be capitalized.
Yes it should be capitalized.
No it should not be capitalized.