A bit of thread drift but as far as Glasgow is concerned the splurge of new seperated cycle lanes during Covid was a massive missed opportunity. They have typically been doe with a bit of paint and plastic bollards. There are fairly steep ramps when they pass bus stops.
As the only seperation from the main carriageway is bollards all the gravel, dirt, and broken glass ends up in the lanes which are not swept. Hence they are puncture magnets.
What they should have done? If there was space to remove a lane for a cycle lane then make it a bus lane. POssibly bus and cycle only. Not taxis. As well as the lanes being wider the buses would sweep the crap off the road. Buses are infrequent enough that sharing a lane with them isn’t a problem. I find the existing bus lanes are the best places to cycle in central Glasgow. I would have welocomed more of them rather than substandard bike lanes. And as mentioned above if you choose not to use a poor quality lane you get abuse from some drivers.