Incidentally I got a proposal to vote on the other day proposing changing Park Lane southbound into park land with cafes which I think would be nice. (https://www.westminster.gov.uk/sites/default/files/mayfair_n... p32)
It is unlikely to be happen due to the 'solutions' proposed in section 3.3.10 through to 3.3.13 (pg33). Which states that there is no will to implement any measures on this part of the thoroughfare by the incumbent landowners ─ any attempts to do so, have been thwarted for more than a century. The well heeled clientèle, do not particularly need a bohemian cafe culture at the doorstep nor do they care about pedestrians, especially when they arrive at the affluent hotels/hedge fund offices/ ballrooms/casinos, in their luxury automobiles to work & play. The addition of having access to exclusive shopping districts, restaurants, entertainment within spitting distance in any direction, further erodes any case for pedestrianisation.
However, there is a good case for lowering speed limit, modernising the subway access and creating more ways to cross between the central reservation, across to Hyde Park.
p33 says "Some of these solutions have been considered in the past, but have foundered, principally due to lack of resource" but that could change.
The road was expanded in the 60s:
>a major reconstruction programme in the early 1960s that transformed the road into a three-lane dual carriageway by removing a 20-acre (8.1 ha) section of Hyde Park
but I'm guessing the trends are a bit the other way now - less towards cars, more towards pedestrians.
People should not be downvoting your comment.