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8 Confusing Road Signs That Even Driving School Instructors Get Wrong

Updated on Jul. 28, 2025

While we all like to think we understand every road sign we see, there are some confusing road signs that have us perplexed

Are these road signs driving you crazy?

Road signs are generally intended to inform drivers and alleviate confusion. But every once in awhile, we come across confusing road signs that are way more complicated than necessary, so much so that even our finest scholars on the subject—driving instructors—don’t understand them. And if driver’s ed teachers don’t know …

Some of these signs contribute to the most confusing driving rules and could definitely use a revision. However, until that happens, we got the lowdown on how you’re supposed to handle these less-than-clear road signs, straight from driving instructors themselves. Keep reading to find out what they had to say.

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Left Turn Yield On Green Sign attached to a traffic light pole made in white black and green color
Solomon Kraner/Shutterstock

Left Turn Yield on Green

Surprisingly, green does not always mean go, and this is a subtle driving mistake many people make. According to John Svensson, former president of the Driving School Association of the Americas, “a solid green does not mean go. It means you may proceed only if safe to do so.” You might see this sign at a busy intersection, especially one with multiple lanes of traffic between you and your left turn, where even if you have a green light, you cannot enter the intersection until those lanes are clear. “The most fundamental misconception is that laws give the right of way to one driver over another,” Svensson says. “It is incumbent on every driver to make certain that the driver required to give up the right of way is indeed doing so and proceed only when safe.” So, just because the other person isn’t supposed to be going doesn’t mean you are.

soft shoulder
Chris Perry/Solent News/Shutterstock

Soft Shoulder

This sign is actually one of three different signs that indicate an atypical circumstance about the road’s shoulder: either no shoulder, a low shoulder or a soft shoulder. In this case, soft shoulder means the terrain is a bit more malleable than usual, which can sometimes happen at the end of winter or just after construction, and is potentially precarious if your vehicle isn’t suited for those conditions.

Narrow bridge sign on country road
Paul Orr/Shutterstock

Narrow Bridge

It’s always good to brush up on safe driving tips for scary driving situations. The Manual on Uniform Traffic Control Devices (MUTCD) states that this sign is a warning that you’re approaching a bridge with less width than the road preceding it, and you’ll just want to make sure you can still clear it, especially if you’re operating a larger vehicle.

Flagger Ahead

If you saw this sign on a driving test, could you get it right? This sign means that a lane of traffic had to be shut down, likely due to construction, and a flagger with a STOP and SLOW paddle is controlling when cars can go through.

Ingerently low emission vehicles allowed
Zooza/Shutterstock

Inherently Low Emission Vehicles Allowed

This very no-nonsense sign is confusing because it is a lot of large words to process in the brief amount of time that you can safely look at it. Hopefully, this explanation will help you recognize and speed-read this sign on sight. Per the MUTCD, it means Inherently Low Emission Vehicles (ILEVs) are allowed to use the high-occupancy vehicle (HOV) lane, regardless of the number of occupants.

The HOV lane is reserved for vehicles with multiple passengers, like buses, vans and carpools, on highways with heavy traffic, and it is intended to encourage more efficient forms of mass transportation. According to the U.S. Department of Transportation, ILEVs have no fuel vapor emissions, so they’re allowed to zip through traffic in the HOV lane as a reward for reducing vehicle-generated air pollution. So take your little Prius and join the HOVs! Don’t have an ILEV? Then you still have to stick to the rules.

No Hitchhikers road sign
Hank Shiffman/Shutterstock

No Hitchhiking

Thumb wrestling must be taken elsewhere. Absolutely no fun is to be had under any circumstances. Just kidding! This sign simply means that no hitchhiking is allowed in the area. If you need a ride, you’ll have to continue down the road to a pro-hitchhiking zone.

object marker road sign street
DebDotDaisy2/Shutterstock

Object Marker

There are no words or hieroglyphs to instruct you here, and with its neon yellow stripes, this sign just sort of … wants your attention? Sometimes the diagonals slope to the left, sometimes to the right, alternating at whimsy, apparently. This is arguably the most confusing sign of the bunch because that assertion is exactly correct, this sign does just want your attention. As the MUTCD will tell you, this sign is just an object marker and will help improve your driving etiquette. The diagonals are sloped toward whichever direction traffic is supposed to skirt around. Use your words, object marker!

An orange diamond sign with a figure of a person at work warns of potential danger
Anne Webber/Shutterstock

Workers Ahead

This sign is just to say that there are construction workers ahead, and you should approach with caution so everyone stays safe. They might not necessarily be shoveling, so it is a bit fictitious in that regard. Use your imagination.

About the expert

  • John Svensson is the former president of the Driving School Association of the Americas.

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