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Columnist Jon Hilkevitch talks to locals who see no rhyme or reason for when the switching happens:
"To many drivers, it's a mystery why the two express lanes are open in one direction much of the time while traffic in the same direction on the four local lanes is running smoothly, yet traffic in the opposite direction is like a parking lot."
Hilkevitch sought out the answer:
"The decision to switch the reversibles to favor inbound or outbound traffic is based on traffic volumes and travel times, but about 80 percent of the time higher traffic volumes are the deciding factor, officials said."