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Same problem in Belfast, some kerbs are cycling/peds then are a normal kerb and then nobody knows what's what.
It's usually not such a problem few people get annoyed by it. Even when you are on a pedestrian only kerb. Lol though at the kerb cycling helmet hi-vis lot ;)
http://bikefast.org/2016/03/14/lazy-danger-shared-footways/
Edit it also leads to conflicts unless there's lots of room..
It's a paradox though. My usual commute is mostly down shared paths. Old railways some, others are simply pavements or pedestrianised zones. So it's ok to cycle with peds there, but not others