I want to be able to easily create a journey following specific roads on a map as opposed to letting Google Earth (or Maps) decide what the most 'convenient' route to take is.

I want more control over route creation, basically. It would be good to create a simple journey, and then be able to warp it to specific roads, and use the 'path tool' when there are tricky areas.

It is not possible for me to use the 'path tool' exclusively, because I want more precise results, and following many hundreds of kilometers using this tool is time consuming and cumbersome. I would like to use the 'path tool' however when I want precise control over parts of the journey.

Up until this point, I have been using a website called mapmyride.com which has been useful, but I'm fed up with it by now. Getting this to work on Google Earth (or Maps) would be much more useful.