Matthew Parris recently complained in his Times column about how these were appearing over seemingly random bits of pavement in East London. Ms Dinsmore wrote to point out that, at the top & foot of stairs, such paving is a boon to the blind but may cause confusion if used elsewhere.
So, just as with the atrocious blister type of paving, the authorities are being counter productive in their enthusiasm for these abominable corduroys, hindering if not always actually injuring both the sighted & the unsighted.
Related post
Tactile paving
Tactile paving
