I had issues with flickering and then I rolled the dice on these, and I can say that the 3 packs I’ve gotten do not flicker - https://www.maxximastyle.com/

Probably “this route may or may not be a construction zone and/or actually have any kind of bike lane”

How is the software support? It seems like you could alternatively get a nice quad-core x86 Intel box with a handful of 2.5G ports off of AliExpress for around $120(you’d have to bring your own RAM and SSD in those cases though) and enjoy full Ubuntu/OpenWrt support.