What Does a Pennant Sign on the Road Mean?

What Exactly Does a Pennant Sign Tell You?

The pennant marks a stretch of road where passing is prohibited. No-passing zones exist where moving into the oncoming or adjacent lane to get around a slower vehicle would be too dangerous, think blind curves, hills that hide oncoming traffic, or intersections. The sideways triangle points along the roadway, and it is typically posted on the left side to reinforce a no-passing line painted on the pavement.

Because the pennant shape is used for no other purpose, spotting one should immediately register as "stay put." That single-purpose design is intentional, and it is part of a nationwide system managed under the federal Manual on Uniform Traffic Control Devices, which standardizes how signs look so they mean the same thing everywhere.

Where Will You See One?

Pennant signs show up on two-lane highways and rural roads where passing zones and no-passing zones alternate. You will usually see the pennant at the start of the restricted stretch, working alongside the solid yellow center line that tells you the same thing from the pavement. When both agree, the message is clear: do not cross to pass until the zone ends. Signs like this are consistent nationwide, though you can still find some genuinely strange traffic laws from state to state.

How Do Road Sign Shapes Work as a System?

Sign shape alone carries meaning, so a quick glance tells you a lot before you even read the words. Learning the shape code makes you a faster, safer reader of the road, and it is worth knowing the traffic signs every driver must know alongside their shapes.

Shapes That Mean One Thing

Several shapes are reserved for a single message. An octagon is always a stop sign. A round sign warns of a railroad crossing, as does the X-shaped crossbuck. A downward-pointing triangle always means yield. And the pennant, our sideways triangle, always means no passing.

Shapes That Signal a Category

Other shapes flag a type of information. A diamond warns of a hazard ahead. A vertical rectangle carries regulatory rules like speed limits. A pentagon marks school zones and some route numbers. Horizontal green or blue rectangles guide you to services and destinations, while brown signs point to parks and recreation areas.

Why Knowing Your Signs Keeps You Safer

Road signs are a shared language, and fluency in it is part of being a confident, lawful driver. The faster you recognize a shape and its meaning, the more time you have to react safely, and the less likely you are to earn a ticket for a missed rule. Sharpening that knowledge is exactly what a defensive driving course does, and in many states finishing one can also earn you an insurance discount. New drivers can build the same foundation with online drivers ed.

For more, explore the full driving resource library to keep sharpening your road knowledge.