I ride Canton Parkway for a reason too. It's part of a long route that I do occasionally. This is one of the roads that has a cycling lane on the shoulder that is not used by virtually any cyclist due to trash. It's speed limit is 55mph. But many motor vehicles are going way faster than that. It's never terribly busy. Probably a car or truck is going by me every couple minutes. They don't seem to mind me or others staying in the traffic lane. They have the left lane they can use.

https://maps.app.goo.gl/j3jmDBQ18uiitgP28

Now Spillway road has nonstop traffic on it. Seldom is there not a dozen motor vehicles passing every couple minutes or so during the slow times. And bumper to bumper 60 - 65 mph traffic during the busy times. Even though it is also posted as 55 mph. Here, I will use the cycling lane. Though it has lots of broken bottles and broken auto glass in it. It's the reason I went tubeless recently. Could include it in my regular ride routes with out having to worry about flatting.

https://maps.app.goo.gl/heGk6R39Z1KaSBV98

The pictures of both might seem like the cycling lane is clean. However it is not. There is a lot of small debris and glass fragments that isn't in the road way for motor vehicles. As their speed creates enough air current to keep them swept clean and pushed into the shoulder/cycling lane.