Traffic control in a metropolitan area is all about timing. You know that, of course, because when you're stuck in traffic, it's the wasted time that bugs you the most. But without the complex, carefully choreographed dance that is traffic control, your commute would be infinitely worse, as Montgomery County drivers found out when the system broke down in November. Here's how the parts of the county's intricate system work together to prevent chaos:
Case Study: Signal 99
One of the hairiest intersections in Montgomery County is along MD-355 where East and West Jefferson streets become Veirs Mill Road. Its nondescript system name is Signal 99, but traffic control folks have dubbed it "the mixing bowl." A look at the morning driving pattern, and what traffic experts do to speed commuters on their way:
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