Route Plotting and Exporting

Hi I am (very) new to OSM. From time to time I need to create maps in CAD (.dwg) and I am hoping to use OSM to create a base map, where I need to show a section of road that would be closed (highlight it in red) and then show a diversion route (in green). What’s the best way to achieve this easily? If I select two points and it auto-creates a route, is it possible to drag the line to a new location (similar to Google Maps)? Once I have a map showing the closed section of the road and the new route I need to export this as an image. Can anyone recommend the best steps for this?

Thank you,

Kevin

With the demo server of Graphhopper you can use waypoints and export the route as GPX, example
With the demo server of OSRM you can drag the waypoints similar to Google Maps, example and export the route as GPX.

There are many more online routing engines using OSM data …