Not my best photo of some Blackberries, but I assume we all know what the aggregate of DRUPELETS of the Bramble plant look like (not strictly berries), and its very late in the season for these friuting bodies.
We all know, of course, that we can eat these lovely "berries", if we catch them in time - they seem to be fruiting earlier and earlier these days.
That said, it is probably best not to eat those Blackberries (or Bramble raspberries sometimes) growing beside roads, due to the toxin build up from exhaust fumes.
Superstition in the UK holds that blackberries should not be picked after Michaelmas (29 September) as the devil has claimed them, having left a mark on the leaves by urinating on them.
There is some value behind this legend as after this date, wetter and cooler weather often allows the fruit to become infected by various moulds such as Botryotinia which give the fruit an unpleasant flavour and may be toxic.