Month: February 2025

Q: I drive through an intersection, almost daily, that has two left-turn lanes, while the cross-street they turn into has three lanes. There are some dots curving through the intersection that seem to suggest that the inside left-turn lane can choose from the two left-most lanes, and outside left-turn lane should go to the furthest right lane. But the markings aren’t clear and from the behavior of other drivers it’s obvious that many of them don’t agree with me. What’s the right way to turn left here?

A: The simple and obvious answer is … just kidding; how about a tricky and possibly unsatisfying answer? But as a warmup, let’s consider an intersection with a single left-turn lane. The law requires drivers to approach and complete the turn “in the extreme left-hand lane lawfully available to traffic.” Or as the Washington Driver Guide says, “Turn from the lane that is closest to the direction you want to go and turn into the lane closest to the one you came from.” Simple, right? You already knew that.

Continue reading “Confusing Left Turns – Too Many Choices”

Q: I regularly drive through a construction project that often has one of the lanes on the freeway closed. Drivers merge in a single lane a mile ahead and often get angry when people pass them in the unused lane. I even got behind a driver who was straddling the line to prevent anyone from getting ahead in either lane. It makes sense to use both lanes and merge at the orange cones, but is that the law?

A: First, a message for the driver that was blocking both lanes: You’re the problem. The law requires drivers to drive within a single lane. Okay, now let’s talk about the zipper merge.

Many drivers, when they see a “lane closed ahead” sign, move over right away, doing the long-established early merge. But just because we’ve been doing something for a long time doesn’t mean it’s the best idea, and many transportation departments around the country, including Washington DOT, encourage drivers to late merge, or zipper merge, when traffic is heavy. Utah has even made it the law.

Continue reading “The Zipper Merge”

You’re being lied to. I know, that sentence sounds like conspiracy theory clickbait. But the lie I’m talking about isn’t coming from the government, Hollywood, NASA, the educational system, or a cabal of doctors. It’s from your own brain. Next time you drive at night, your brain is going to tell you that you can see better than you actually can.

Vision has two jobs when you drive; your ambient vision takes care of lane-keeping (helping you know where you are), and your focal vision identifies objects and obstacles up ahead. The problem is that we don’t need a lot of light for lane-keeping; our headlights are more than adequate. But they fall short for obstacle recognition, and sometimes by a lot. Your ability to safely travel in your lane leads you to believe that you can adequately see and respond to any obstacle up ahead in the road. That’s the lie.

Continue reading “Your Headlights are Worse than you Thought”

Q: When the roads get snowy, are snowmobiles allowed to ride on them in town?

A: Last week, when our streets were covered with a blanket of snow I saw a monster truck drive through my neighborhood. I don’t mean a jacked up pickup truck with oversize tires sticking out past the fenders a few inches, like we normally complain about. I’m talking about an actual home-built monster truck with enormous tires entirely outside the body of the vehicle. I didn’t see if it had a license plate, but this person clearly built this with no intention of ordinary road use. On other snow days I’ve seen people driving all-terrain vehicles down the street, cars towing people on sleds, and cross-country skiers gliding down the middle of the road. And you have a snowmobile zipping through your neighborhood.

Continue reading “Snowmobiles on the Road”

Q: The law requires registration and license plates “to operate any vehicle on a public highway.” Does this mean that electric bicycles need to be licensed in Washington State? Also, in the quote above I note the word “highway”. Does that include city streets and county roads?

A: Here’s a paradox. A bicycle is both a vehicle and not a vehicle. According to the principles of classical physics, an object cannot be both a specific thing and not that thing at the same time. But this isn’t physics, it’s quantum mechanics. No, wait, it’s traffic law.

Continue reading “Registering Electric Bicycles”