Modern manners: Etiquette for drivers and cell-phone yakkers

Every morning as I drive my children to school we come to a three-way stop, a T-junction at a point where two lanes of incoming commuters have to pause and wait their turn. Most days, the traffic stops and starts with perfect harmony. If you’re in the third car to arrive at the junction, you wait until the first two cars have gone before taking your turn, according to custom.