Area of Colorado at 70 km. scale. Note the road indicated by the pointer. It shows as a paved local road Co 4.
Now at 30 km. scale. The road actually disappeared at 50 km.
And zooming in shows it's not paved all the way. This is the scale the road actually should have displayed following BaseCamp parameters. MapSource displays the road correctly using gthe same map version.
Another interesting "feature" is the way highways change colour at different scales. This make planning difficult when the grade of road is important to the process.