[sustran] 1) Motorised 2 wheelers 2)Hong Kong has all the solutions?

[Obwon]

Given the views expressed, it can only make sense to offer limited motor
free zones where walking and hpv travel are permitted, encouraged and
possibly assisted by electric propulsion schemes.  Perhaps an over head
power rail that would allow one to operate a hybrid hpv/ev in the area
and leave their motorized vehicle quite some distance away.

  The worst percentage of pollution as well as the most harmful effects
are both created and delivered in high congestion areas. Because they
are available there in high concentrations where they can directly
access people before they disperse.  And because the engines themselves
operate with decreasing efficiency as average operating speeds decline.  

  If small combution engine free zones can be created and say moving
sidewalks, hpv's ev's trams or trolley's are used to navigate the area. 
People, say eating lunch on sidewalk cafes won't have their foods
'seasoned' with partially burnt fossilized fuel, so they might enjoy it
better.  People also might note that the air doesn't have that 'urban
motorized' smell to every breath they are taking.  So they might then
approve that such areas be expanded to include nearby congested areas.

  Once people become acustomed to traveling within these areas and find
they are pleasant healthy places (because of the exercise offered by hpv
use and lower pollution/noise/stress levels). Then it becomes a simple
matter to have people accept getting from one of these area's to another
such area by use of motorized public transportation.  Since motorized
public transportation operates more efficiently over longer distances
with fewer stops.

  Well, that's my contribution, hope it's some help.

  Obwon