- Country roads typically have more curves than interstate highways.
- Country roads are typically curvier than interstate highways.
- Country roads typically have more curviness than interstate highways.
I assume by “motorway”, you mean an M-class roadway in the UK or a US interstate highway. It’s a dual carriageway / divided highway with at least two lanes each direction and sometimes more, and which has only limited on-off access ramps and no stop-and-go lights. The speed limit in the US is usually between 55–75 mph, although in one curvy place on I-70 in Glenwood Springs, Colorado it is only 45 mph where there is a warning sign that “curves tighten”. Also, I believe Texas now has it up to 80 or 85 mph. In the overpopulated eastern portion of the country, 55 is usually all you get.