Newcastle has a quite extensive network of pedestrian decks and underground ways segregated from traffic. The network makes it possible to stroll down all the way from the city library to the pub ‘Fever’ under the Tyne Bridge with minimum contact with vehicle traffic (also, of course, minimum contact with other pedestrians!) although the network is not completely connected and it actually terminates in the air above the pub.
Segregated pedestrian concrete structures often appear as an example of the failure of post-war modern architecture and urban design. The rationales of pedestrian protection and efficient movement flow misled the design by overestimating the idea of segregation and overlooking other qualities good streets better to have, such as livelihood.
For the same reasons, the segregated pedestrian network shown in the map cannot be said good space for travelling. Limited entry points make them virtually bridges over or under-ground providing relatively weak permeability and reducing possibility of optional activities. Rough finishing of exposed concrete gives deteriorated or intimidating atmosphere adding to empty shop/office blocks along the deck ways.
Some parts in the orange-colored and the yellow-colored are relatively often used by pedestrians when they are the only ways to cross over or under the major roads. However, it is almost impossible to see a single person in the red part (Yes, I wander around quite often) since the part is almost hidden from major pedestrian flow and the office buildings share their balcony space with the decks, are mostly empty.
However, even though it has many obvious design flaws, I found the space somehow interesting. 3-dimensionally organized space and ageing concrete surface (with no human there) give feeling of wandering around some ruins from distant time. The space could be rehabilitated in some way or completely re-built someday. I wouldn’t argue that the decks should be ‘listed’, but I would like to recommend you to visit. It might be demolished like the ‘Get Carter car park’.