That Solid White Line on I-69 Actually Means Something

I'll admit something.

Every time I drive north on I-69 through the construction zone near the bridge approach, I find myself saying the same thing.

"Please don't change lanes..."

And then, almost without fail, someone does.

It's become one of my biggest driving pet peeves, not because I'm particularly attached to painted lines on the road, but because that solid white line actually means something.

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Yes, a Solid White Line Means You're Supposed to Stay in Your Lane

Most of us remember learning that a solid yellow line means "don't pass."

But a solid white line often doesn't get the same attention. According to Indiana traffic laws and the Indiana Driver's Manual, a solid white line separates multiple lanes of traffic traveling in the same direction and prohibits lane changes.

In the I-69 construction zone between Highway 41 and the Green River Road exit, that solid white line is there for a reason.

Why the Lanes are Different Right Now

As work continues on the new Interstate 69 Ohio River Crossing connecting Indiana and Kentucky, northbound traffic has been shifted.

The two travel lanes remain open, but they've been narrowed to make room for a protected construction access road behind a concrete barrier.

The speed limit has also been reduced from 60 mph to 45 mph through the work zone.

Because the lanes are narrower and construction vehicles and dump trucks are entering and exiting nearby, INDOT replaced the normal dashed lane markings with a solid white line.

That's not for decoration.

It's intended to keep traffic predictable through one of the busiest work zones in our area.

Read More: Check Out INDOT's Newest Intersection Design in Indiana

Predictability is Safety

One thing driving instructors emphasize is that safe driving isn't just about avoiding crashes.

It's also about predictability.

When everyone stays in their lane, other drivers know what to expect.

Unexpected lane changes inside a narrowed construction zone create one more thing every nearby driver has to react to.

In normal traffic, that might just be annoying.

In a construction zone with reduced lane widths, concrete barriers, and workers nearby, it becomes much more important.

A Little Patience Goes a Long Way

None of us enjoys construction zones.

I certainly don't.

But this particular stretch of I-69 is temporary, and it's part of a project that will eventually connect Indiana and Kentucky with a brand-new interstate bridge.

Until then, staying between those solid white lines for another couple of miles seems like a pretty small tradeoff.

Besides, once you make it through the work zone, you'll have plenty of opportunities to change lanes again.