Louis Hakizimana comments

No cost alternative for some area, they can set 2 UP and 2 DOWN escalators BUT with different positions(Left and Right) of "walking or running" people. This can fix this issue in places having double rides.

Or

Use turn:

Usually in Japan its a habit to leave 1 stair between us, so, with this combined with new idea all can be fixed with no cost for all places, without change or add anything else:

If a person can't stand on other people’s side, all has to do is at least, to LEAVE a STAIR in between as usual (avoiding side-by-side cases) so others will turn around to continue without waiting or being blocked behind.

Let take e.g of a place when the LEFT is used for 'walking/running" people:

_ :free space

1: person

∆: Forward move

/: Right move

\: Left move

NG scenario:

_.1 (used stair)

. (free stair)

_.1

.

_.1

.

1 (x) (theLeft blocked the way)

∆

1 (this is person is blocked)

OKFixed scenario:

_.1 (used stair)

. (free stair)

_.1

.

_.1

.

_. 1

. (o) (solved)

_

. (o) ( as usual, 1 stair in between)

∆.1

1 (this person will use free right side and continue ...)

Move looks:

OKFixed scenario:

_.1

.

_.1

.

_.1

.

∆. 1

_.\

∆

/._

∆.1

1 (This running/Walkin person)

I think with this approach there is, almost, no cost. It just based on change of the use-concept.

NoCost

This is my own short analysis view's solution. If can't work i believe can be improved to solve the mentioned issues, in this article.

Onegaishimas...