Cadillac rolls out in-car Internet access | The Car Tech blog - CNET Reviews. Oh, yeah. Here is a great idea. While drivers are talking on their cell phones, texting their friends, and generally not paying attention to the road, now Cadillac is giving them in car WiFi for $29 a month. A user will now be able to browse the web, send and receive email, and generally cause havoc on the streets. Actually, tiny USB broadband wireless modems have made Internet available in moving vehicles for some time now. So, if you want to kill yourself by texting and browsing and driving a car simultaneously, go for it. I have used mobile broadband wireless in my car before; however, I was a passenger. Until we have cars that are automatically whisked to their destination by invisible cables in the road, may I make a modest proposal. Don't use the Internet while driving, just because you can.