I've started using Google's My Maps feature for planning both an upcoming trip to California and some semi-regular motorcycling routes.
I've figured out how to create maps and share them with people, but I'm having difficulties with the directions functionality. Once I've saved a route I can't seem to do anything with it; I can view the route on a map but that's it. This is okay I guess for walking but it's obviously pretty useless for driving or transit.
How do I start the route? As in: get directions, traffic, time estimates, navigation etc? At the moment I'm looking at the saved route on the map and just copying the source and destination locations into a new directions page on Maps, but this obviously doesn't give you the actual same route that you customised on My Maps.
Best Answer
After much testing I found the following to work:
Using linking or copying, get the PC created route to a mobile device (e.g. via text).
When you open it, you will see what the OP describes: the route with a Preview but no "Start" driving feature.
Now, in order to get a "Start" button and commence navigation:
The Start button should now appear and you can navigate.
It is not what one would call obvious.