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The Myth "It's illegal to drive in the left lane if you're not passing someone — you have to move over for anyone coming up behind you." |
The Reality "The law only requires slower than normal traffic drivers to keep right. If you're moving with traffic, there's no legal obligation to get out of the way." |
"Left lane is for passing only" gets repeated on California freeways with the confidence of settled law, usually aimed at a driver who's doing the speed limit in the fast lane while someone flashes their brights from behind. It feels like it should be a rule. It isn't — not the way most drivers mean it and the actual statute is narrower and more specific than the bumper sticker version.
CVC §21654 requires vehicles proceeding at less than the normal speed of traffic to drive in the right hand lane, or as close to the right edge as practicable. Read carefully, the obligation attaches to a condition, moving slower than the traffic around you, not to a lane. A driver traveling at the speed limit, keeping pace with the flow of traffic, isn't the driver this statute is written for, and isn't violating it by staying in the left lane. The law has no separate, general rule making the left lane exclusively for passing; that idea doesn't appear in the vehicle code the way people assume it does.
Where the confusion tends to come from is real driving norms and courtesy overlapping with actual law. Most drivers, most instructors, and most highway patrol officers will tell you it's better practice to let faster traffic by, and that's sound advice, matching speed to the car ahead and moving over when it's easy to do so keeps traffic flowing and avoids unnecessary conflict. But "better practice" and "legal requirement" are different categories, and CVC §21654 only actually mandates the right lane for a vehicle that is, by the statute's own language, moving slower than normal traffic flow regardless of what lane someone behind them would prefer they be in.
The exceptions built into the law reinforce the same point: a driver passing another vehicle, or preparing for a left turn, is explicitly allowed to be in a lane other than the rightmost one, slower traffic or not. The rule was written to keep genuinely slow vehicles from blocking the flow of traffic, not to settle an argument about lane etiquette.
CVC §21654
