I vaguely remember telling my friends about this bus; 4.5m high with 2 levels (with approximately 2m clearance below), allows vehicle to travel through from below it, etc. And they didn't believe me! See, this bus isn't a product of my imagination :) It's soon to be launched in Beijing. What an innovative way to ensure public transportation isn't hampered by road jams! Plus, it's cheaper than a railway system & runs on electricity based on energy derived from the sun. Awesome.