In a move meant to promote reducing congestion, the DOT yesterday announced that airports can now charge airlines landing fees based on time and overall airplane volume, rather than simply their weight. Critics charge the previous policy allowed airlines to schedule flights on smaller and more regional jets during busy times, when what were needed were fewer and larger jets.The move would allow airports to schedule their flights throughout the day. Most likely the fees will be passed on to consumers, as they should. A good way to increase in a system is to make those who want to use its resources when they’re in short supply pay a premium. Airlines are expected to lobby fiercely against the measure.