Dave Arquati wrote:

Another irritation for office workers or residents of flats and houses
next to a monorail route is that their reasonably private first or
second floor room suddenly becomes a fishbowl for thousands of people
gawping in every hour.

Singapore has an interesting solution to that; their residential-zone
"mini-metros" have LCD windows, which are automatically blacked out at
predefined locations where privacy might be an issue.

Neil