Complex sentence: Another problem, the A601 (M) isn't the A601 under motorway restrictions, as its number means, because the A601 is the Derby inner ring road-over 100 miles (160 km) away.
Split into simpler sentences: Another problem, the A601 (M) isn't the A601 under motorway restrictions, as it's number means. Because the A601 is the Derby inner ring road-over 100 miles (160 km) away.