work in big cities is not an easy thing...higher pressure...quickly life rhythm...so many boring thing...let's talk about that terrible and crowd traffic first...all of us have to choose by bus/by underground train, or drive your own car to go to work...and most of us are so boring for by bus...there are too many person and too crowd, dont expect to have a seat...even for an armest...and especially for that terrible smell...from above story which sister whitney described,we know it's so terrible to by bus...too many shortcoming.so, somebodies plan to have their own car.but you know there is also some shortcoming for by your own car...first for the safety...with a sleeping to drive car is so dangerous...secondly...you know drive car is too tired if you have ever drived it yourself...and the most important it's not so cheap/easy to use that car...all kinds of fees...for that, seems it's not easy to burden for our working level people.on the other hand, I heard that Gov is preparing to limit for private car...you know, if every one have his own car...then our highway can not afford for that...and that car gas can lead the temperature rising...it's so harmful for our human resource...by bus, or by your own car? how do you think...can you list for their merit and shortcoming?please comment, thanks...