I'm interested in making a map that highlights all the road I've ever cycled on.

I am aware of several online methods of mapping a specific route, but this is not what I am wanting as I'd want an overlay of all routes and no need for data on distances or elevation, etc.

All I want is something like taking a road map and using yellow highlighter to trace a road. I've done this on paper maps, but due to differences in scale and being able to trace localities that are far away this is not really practical - so I thought I could find some online tool for this.

Any ideas?

Al