If you have Google Maps on your phone you can load a route line into the app
Unfortunately, you cannot follow the usual Google Maps "navigation" features with display and voice directions BUT you can track your location in the app and follow the displayed route line.
You must have Google Maps installed on your phone
Visit this website on your phone's web browser: Chrome, Safari, Edge etc
Press the button for the route & direction that you need
If it does not load then press 'Try again' or come back to this site and try press the button again
The route line should load in Google Maps.
Then follow these instructions to track your location:
Tap anywhere on the base map to get rid of the white box at the bottom
Tap the location icon in the bottom right to track your current location
The blue dot on your screen will track your location so you can follow along the blue line for each route.
Just press the button on this website for the next route you need, and the new line will replace the old line on Google My Maps
Press any feature of the map e.g. a Location Point, press More Info, press Show Map Legend, then press Close
Select a point and press (i) More Info
2. Press VIEW MAP LEGEND
3. Press x CLOSE