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The National Highway Traffic Safety Administration (NHTSA) lists 24 different signs of drunk driving.

Many of the signs NHTSA list are also indications of bad driving in general.

So what is the difference between bad driving and drunk driving? Well, being drunk.

Below is a list of signs that the driver next to you may be drunk.

10.  Swerving through the lane.

Intoxication reduces a driver’s ability to concentrate and judge distances. This can result in swerving and then over-correcting which can cause collisions or near misses.

9.  Hugging the center line.

Drunk drivers may attempt to compensate for swerving or avoid swerving by staying close to the center line. This results in a very dangerous situation for oncoming traffic.

8.  Collisions (or near misses) with objects or other cars.

Drunk drivers are more likely to hit other cars or objects on the side of the road (such as mailboxes or signs) due to swerving or staying too close to the fog line as well as delayed reaction times.

7.  Excessive Braking.

Drinking harms a person’s ability to judge distances. As a result, drunk drivers may brake erratically or unnecessarily while trying to prevent collisions.

6.  Tailgating

Drunk drivers may tailgate to try to copy the vehicle in front of them in an attempt to mimic safe driving.

5.  Unnecessary stopping.

Unnecessary stopping, such as at a green light or in the middle of the road, is another sign of impairment.

4.  Inappropriate or non use of turn signals

Leaving a turn signal on for an extended period of time can also be a sign of impaired driving. Drunk drivers also may also signal one way and turn the other.

3.  Making wide turns.

As previously mentioned, studies show drunk drivers have difficulty with driving basics and often over-compensate or exaggerate basic driving actions.

2.  Running red lights or stop signs

This one is pretty obvious. Drinking impairs focus and inhibition may result in drunk drivers not paying attention to the road and running through intersections.

1.  Failure to use headlights.

Drunk drivers show an inability to properly operate their vehicles. Some police officers report this is the most obvious sign of drunk driving.