Why is Texas such a big car shipping state?

https://docs.zohopublic.com/file/fwfv5f42936633f9f43a2afbf9a108a7f6d84

Why is Texas such a big car shipping state? Texas itself is such a gigantic state that it could become a country of its own. It's so huge that only its DFW metro area is like two giant cities combined into one.