It would be great if the corridor properties would allow a tab/field that shows the length of the given region. If the tabs of the start station and end station are provided, surely its not a big ask to add a region length to the available tabs to view.
While Autodesk offers the 'solution' of using Dynamo user interface on an extracted object, this is a cumbersome method and is not helpful to quickly discern region lengths. Something like the image below would be great.