You mean at the end of a line? Well it depends on how much room you have hyphenate at a syllable is probably best. If you have little space before the end of the line don't hyphenate a word. You could hyphenate like this trans- portation.
Year-end is hyphenated in AP Style and is an adjective.
You do not need to hyphenate.
You do not hyphenate the number.
You would hyphenate "thank you" when it is used as an adjective before a noun, such as in "a thank-you card."
Don't hyphenate; ongoing is one word.
You hyphenate it only at the hyphen.
I think it's more accepted to hyphenate it.
Can you, or should you? You can hyphenate it if you're moving between lines in a paragraph and need to break up the word. You shouldn't hyphenate it normally.
If you absolutely must hyphenate a word at the end of a line then you should do so between syllables (and not in the middle of a syllable) to ensure meaning remains intact. A good way to hyphenate this word would be: investi-gation.
You can hyphenate the word improvement like this: im-prove-ment.
No...