This is not CR320C, it´s the CR320:

https://map.geoportal.lu/theme/main?version=3&zoom=17&X=677459&Y=6435214&lang=de&layers=2729-351-181-3207-745&opacities=1-1-1-1-1&bgLayer=blank&rotation=0&features=&time=--------

CR320C reaches only from carrefour Hoscheid-Nord (N7/CR320C) to Mierschterwee @Hoscheid