Passing lanes on highways in Kansas are added lanes to help cars pass each other, reducing delays and making driving safer. The Kansas Department of Transportation started building these lanes in 1994 to improve traffic flow without needing to build more expensive four-lane roads. A study sponsored by KDOT looked at how effective these passing lanes are and found that they can help traffic move better and be safer, even on roads with lots of crossroads. The study looked at things like how often cars pass each other, how fast they go, and how much time they save. Overall, passing lanes can be a good way to make driving easier and safer on busy two-lane highways.