interesting. I don't wear sunglasses while cycling unless I am near the beach where there are no trees on a sunny day.
cycling is like baseball ~ it doesn't take much to make it interesting
But the park district has actively resisted safety features for night use. When the path was extended with a new section the edges were initially marked with reflective white stripes. It made that portion of my commute much better and I felt much safer riding this portion of the path after dark compared to other sections. But the park district decided the stripes were contrary to their guidelines and went to considerable expense to have them all ground down. There's also a portion of path with some fairly sharp curves. These were also marked with white stripes initially but again the park district had the stripes removed - in that case by covering them with black paint. The various barriers (bollards and fences) along the path at intersection crossings are also poorly visible at night. Most, but not all, have some minimal reflectors - but very small and not well maintained.
Hoping the linked article might change some minds on their path design guidelines.