Comments on:

Study: D.C. area home to many of country's most congested roadways

Back to the article » |
Much of the Washington area ranks among the nation's worst spots for traffic congestion, a new study has found. GPS maker TomTom collected the data. The company used its systems to calculate drivers' speeds every few minutes over a two-year period, then stacked the data up against the posted speed limit on the specific road. A city's traffic was defined as congested if drivers could travel at...