If you've driven any area expressways, it's an issue that you may have come across. Several states are cracking down on it.
On Rochester expressways, it's as inevitable as a rush hour traffic jam.
"Get on any expressway around here you're gonna see it within five minutes probably," said driving instructor Larry Scott.
Though it may be the cause of those traffic jams.
"It suddenly creates this logjam, that starts to back up and back up and back up and back up."
New York's only regulation against slow drivers in the left lane of expressways only pertains to the state Thruway, but hit any local expressway and you'll see it.
"The vehicle in the left lane is up there tailgating the other car," said Scott. "They sit behind you, want you to move. They have places to go."
We took a spin with driving instructor Larry Scott ion Interstate 490. And then, equipped with several cameras, took our own car out, where again and again, we encountered drivers traveling at or below the speed limit, traveling in what many consider to be the passing lane.
"Usually it's people not paying attention," said Trooper Mark O'Donnell. "They really don't have any idea what's going on in the world around them, which makes it a very dangerous situation."
O'Donnell says tickets for so-called "left lane campers" are rare, but those who drive slow in the left lane can cause problems, from unsafe conditions for other motorists, right up to road rage.
"I'm sure you've seen it. I'm sure everyone's seen it. People get irritated when someone's driving under the speed limit in the left hand lane," said O'Donnell.
"Once there are patterns where there are cars going different speed, because someone's in a lane going slowly, people are trying to get around them... it can cause not just logjams of traffic, but accidents," Scott said.
Several states do have laws governing left hand lane driving. New Jersey just recently increased the maximum fine for a offenders to $300.
"A lot of people don't understand traffic flow. You get the occasional slow driver, left lane," Scott said.
The solution, say troopers, is found in awareness.
"We would encourage everybody to drive right and pass left," O'Donnell said.
That, and to avoid being a highway hog: a little kindness.
"It's just a courtesy thing, and we would encourage everyone to be courteous on the roadways."