Bell notes that CarPlay typically requires you to have:
a) a car
b) a car that supports CarPlay
Since he wants to just install an iPad into the dash of his car, Bell has been working to get CarPlay running on top of SpringBoard.
"However, said car systems are usually terrible (with crappy resistive touch screens), and I personally just want to have an iPad installed into my car's dashboard. So a current side-project of mine is to port the CarPlay system to just run on top of / replace SpringBoard :D"
While still in the early stages, 'CarPlay Activator' has been released on GitHub for developers to play with and contribute to.
You can see some video and photos of the progress below. Please follow iClarified on Twitter, Facebook, Google+, or RSS for updates. Hopefully, we'll soon see it released as a tweak that can be easily installed.