What will be the primary form of transportation in American cities and metro areas in 20 years?

Question

And what will be the primary form of transportation in Portland and Seattle in 20 years?

Answer 1

3-wheeled motorcycles using North America piped natural gas.  These will initially be 20 year old machines from Asia, India, & Russia.   After Harley-Davidson retires last fuel thirsty product line it will galvanize footsore former chrome buffs with loud pipes of new 2028 methane powered scooter;

touted as 'Thunderdome' it will utilize gas generated by pigs.

Answer 2

Bicycles or on foot.  For two reasons.  Reason one = Less emissions.  Reason two = Not enough room in built up cities to drive cars down the street.

Answer 3

Ask Osama bin Laden.  Probably mules and donkeys.  They are winning, you know.

Answer 4

Probably some kind of ingenious car, like a water car or something like that. That would be pretty cool.

Answer 5

probably walking, as people park their their cars on the nearest congested highway in the morning.

Answer 6

Probably something with a very small carbon footprint... like a HORSE.