ok jex,in my opinion the best way to move around a conjested city or leave is via bike or motorcycle i have rode a mountian bike or ten speed in the city and in the country just about all my life as well as motorcycles. in an emergency you can thred thru anything a motorcycle has the advantege of power,speed,and more cargo carrying capacity........a mountain bike has the advantege of goinig around obstickles via sidewalks, stairs,any were a road is not an option for travel........even an elevator......you need no fuel,and you can carry what you need in a day-pack on your back.........of corse you will have to ride regularly to build endurance....hope this gives you some good options...........