Interstate 405 runs 30 miles along the eastern shore of Lake Washington from Renton in the south through Bellevue, Kirkland, and Bothell to its junction with I-5 at Lynnwood in the north. It is the primary bypass route for commercial vehicles avoiding downtown Seattle on I-5, and it is widely regarded among truckers as one of the most difficult urban driving environments in the western US.
The combination of extremely high traffic volume, curves and hills that are unusual for an interstate, a chronically degraded road surface, and aggressive driving behavior from a tech-corridor commuter population creates conditions that demand constant attention from commercial drivers.
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