Motorcycle I think, because if we use car.. the traffic will be too long (in my country at least) and with motorcycle we can easily drive pass all the traffic since motorcycle are smaller than cars.
Why not bicycle or just walking? Cause.. I don't like to waste to much energy .. it's good for life but if we're rushing? that isn't a great transportation
But if we're talking more which mean we can have any kind of transportation (maybe flying around with jet or heli?)
Train/Monorail should be good too (sadly, my place doesn't have that because of our uneven ground)
Motorcycle, because I like to look metal it is efficient in terms of traffic, it is (relatively) light on fuel, and is more efficient in the time-to-distance-covered ratio than a bicycle.