Three years ago, before she became a pioneer on the transportation frontier, Justy Mayernik did what millions of other commuters do-and hated it. She spent two to three hours each weekday driving between her home southeast of Seattle and her job as a teller at a Key Bank 30 miles north-adding her straw to a staggering load of traffic congestion, air pollution, and costly demands on the transportation infrastructure. She and her husband once lived closer to her workplace, but had moved to one of the last spots in that booming region where they could still afford a house.

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