Meaning of 車用 in Japanese

車を運転する時はいくら注意してもしすぎることはない。
You cannot be too careful when you drive a car.

何の用でここに来たのですか。
What has brought you here?

それから服を着て、講義用のメモを手さげ鞄に詰め込み、階段を駆け下りた。
Then he got dressed, stuffed his lecture notes into his briefcase, and ran down the stairs.