She knows the traffic thins by 7 p.m. She'll scan the Web for traffic reports in the late afternoon. Often she'll delay the commute with a workout at her company's fitness center. But leaving later means little time for errands or serendipitous shopping. She reserves one night for groceries, another for a trip to the cleaners.
Tonight's a bit different.
The problem, she knows, is that thousands of other commuters have the same idea.