Surely what we have to consider with the traffic calming measures on Windlehurst Road is have they reduced traffic and speeds on the road, have they made road usage safer for other road users. Have they potential cut down accidents or deaths. These are much more important questions than whether x has been inconvenienced on their journey or has had their car damaged.
Well, it's a point of view I suppose.
Whether the measures have reduces speed is in many ways a pointless question. There are many things which could reduce speed. Digging major potholes, encouraging animals to run across the road at random, placing road humps etc. All of these would work, but all are silly. Normal traffic enforcement works perfectly well, although since we have only about 10% of the police that the area needs, it might need some changes to work effectively.
When it comes to traffic reduction the real question is do we actually want to reduce traffic. I would say no we don't.
The measures undoubtedly make the road less safe. OK, insisting that cars go at no more than 4 mph and must be preceded by a man with a red flag, might make it safer, but it would cause more problems than it would solve. Road humps like the ones there now are a menace to all road users and it is astonishing that anyone could in any way support them.
Overall, the road humps, are counter-productive, they are unnecessary, the make the road less safe not more, they do not solve any problem which cannot be solved in better ways.