
[Update: Facebook commenters pointed out that the behavior I’m advocating for is already legal per Washington Administrative Code 468-510-020, which lifts the “keep right” requirement for the 40-mile stretch of I-5 from Tukwila to Everett, and on I-90 between I-5 and I-405.]
Every June, the National Motorist Association uses its own Lane Courtesy Month to produce a rush of news stories about the scourge of “left lane camping,” or drivers who remain in the left lane despite another motorist wishing to pass. A representative paragraph from Vox:
That’s because even if you’re driving fast, there’s always someone going faster. If you promptly get back over after passing, that car will be able to pass you, allowing everyone on the road to get to their destinations as quickly as possible. If you don’t, it’ll inevitably lead to buildups of traffic and likely raise the chance of accidents.
That same reporter, in a conversation this year with NPR’s Robert Siegel:
When you’re traveling on the highway, the moment at which you’re most at risk of getting into a crash is when you’re changing lanes. And when you have people going slow in the left lane, as well as the right lane, then people who want to move faster kind of have to zigzag back and forth. They have to change lanes looking over both different shoulders, and it just increases the amount of possible accident scenarios that can happen.
Look at the two statements I bolded above, which to me seem inherently contradictory in urban settings. “There’s always someone going faster” assumes both the right of drivers to create differential speed conditions and your responsibility to yield to their desires. But the Solomon Curve shows one of the most dangerous driving behaviors is deviating from the median speed of traffic, whether slower or faster. So if you’re traveling near the speed limit in the left lane, you should have zero responsibility to move over and are in fact doing a favor for overall safety and flow. The notion of constant lane-switching to appease lead footed drivers is contradicted by the same writer’s second statement, that changing lanes is inherently one of the riskiest behavior. These two are irreconcilable.



