Sort of a out loud thinking of being seen in Iowa. In 1956/57 I was running veal calves from MS in to Rath at Waterloo. Later same year produce/fruit from FL to the Cities. Entered IA at Keokuk and run US 218 all the way up. It's zig/zag routing followed the old land lines so there was some learning curve in driving it, especially in winters snow/ice.
If questioned; and without becoming more familiar over the tears with interstates etc, I would have laughed at being unseen in Iowa.
Reason I would give would be: How, you look ahead and see 3 hog haulers coming and peek in mirrors and see at least 3 RUAN tankers chasing you. Trucks were as thick as hair on a dogs back all night. And they ran. No piddling along, you got after it or got passed. And not a fun experience on the narrow concrete 2 lane with the slanted curbing.
Funny, I did not know until a few year ago that RUAN pulled anything but tankers.
So traffic is thinner or more spread out for no one to be aware of his travel over the route. Or they are not talking...