I ride around the Oriental/Evans Bay route quite a bit, and while there’s not usually much in the way of glass on the road there’s often gravel on the curve of Point Jerningham and broken mussel shells in the cycle paths from seagulls being clever about getting a feed. The first isn’t too good for my nerves (pedalpedalpedalfark!) and the second is tough on my tyres.
Now there’s the opportunity to tell WCC about any litter issues you find are coming up on your ride. Just click on this handy link to be instantly transported to a nice, short survey on the matter. Unfortunately there’s no option for 13 Centimetres Wide Does Not Constitute A Cycle Lane In Oriental Bay Or Anywhere Else, Mate, but apart from that slight deficiency it’s all good.