andrewr, as an engineer you will be aware that no measurement is without bias. And it seems that your rounding shows that. I measured part of HOP to 216cm and part of Devonshire Rad as 210cm. But please, this is getting us no where. I was responding to your post where you said:

[quote]
I see no reason why people shouldn't be authorised to park on those [Devonshire Road] verges, in suitably marked boxes, so as to leave room for cars to park and pedestrians to push their buggies on the pavement. ... I'm actually very surprised that parking has been permitted on the pavement in parts of the hill in Honor Oak Park where the pedestrian width seems inadequate.
[end quote]

Using your measurements, we are talking about a difference of 20cm here! I was merely asking why you thought the Honor Oak Park pavement seemed inadequate for this but it is ok on Devonshire Road.

My own view is that the pavements are not wide enough to support this and I suspect we may have to agree to differ on this.

The root cause of the pavement parking is surely the use of Devonshire Road as a rat run. I feel that this is what could be more usefully addressed. And, as it happens, I agree with the idea of a survey - I just think it should be focussed on journeys taken instead, this to address the Park and Ride nature of the congestion.