A friend of mine making the long trek from Manila to my house in Bulacan over the weekend made an interesting observation while mired in Saturday evening traffic along Commonwealth Avenue: The new MRT-7 line under construction along that busy thoroughfare occupies fully a third of the width of the road. Even when the construction project is completed, she suggested, traffic along Commonwealth is going to be just as bad as it is now if not worse, simply because there will be less road.