In uk.transport.london Adrian wrote:
That's a reasonably decent sized stretch of large "shed"-style retail.
It's not going to be easy to find a similar area of land to repurpose to
a similar retail park. Removal of those stores won't exactly be a great
loss to the denizens of Watford - there's a TKMaxx in St Albans or
Hatfield, there's a Homebase and Staples at Apsley, or alternatives
within the big Bushey retail park, but they're all a drive away from
North Watford.

If they're building 'over the top' of TKMaxx on a flyover, perhaps they
could keep TKMaxx underneath? Businesses in railway arches are a fairly
common phenomenon, so how about some road arches? Noise could be a problem,
but perhaps not if well designed. Or, as they do in Asda, just play loud
music to give the customers and staff a headache and distract them from the
road noise.

Theo