Construction worker holding stop sign?

I was driving on a rode this morning and there was a bit of construction on the road.
there was a guy there holding a red octagon stop sign on the side of the road.
So thinking it was just a regular stop sign, I came to complete stop at the man, looked right and left, even though it wasn't an intersection, and

I was driving on a rode this morning and there was a bit of construction on the road.
there was a guy there holding a red octagon stop sign on the side of the road.
So thinking it was just a regular stop sign, I came to complete stop at the man, looked right and left, even though it wasn't an intersection, and after three seconds, I proceeded to pass the stop sign. I was driving like 15 mph bc there was construction next to me, and in my rear view mirror I saw the sign holder look at me and throw up his arms like "wtf are you doing" so I'm thinking he wanted me to stop like a red light, and not a stop sign. It was below freezing today so i had my windows rolled up and couldn't hear his instructions. i'm not even sure he tried to talk to me.
What was I suppose to do? I've never encountered this before. I hope I don't get a ticket.

Other answer:

The Fury:
When a construction worker, police officer, etc. is manually holding a "Stop" Sign, or "Slow" Sign means you follow that until you clear the construction area.

When a construction worker is holding a stop sign, you stop until otherwise instructed. Usually they are holding a double-sided sign and will flip it around to "Slow" when you can go, if not, once they put the stop sign down, you may proceed slowly.

General rule of thumb in construction zones is 10 mph under the regular, posted speed limit until you are out of the construction zone. If the people behind you are too impatient, that's on them, it's your ticket, not theirs. Fines double in work zones.

I hope this helped!

Joseph:
You were supposed to stay there until the worker signaled that it was safe to proceed. There may have been a piece of construction equipment about to enter the road, or a single lane was being used for a two way traffic and you were about to encounter the oncoming traffic head on, or the workers were lifting a load over the road.

By going though the stop sign you put everyone's life, including your own in danger.

logicalgal:
When a Construction worker or any other human is holding a Stop Sign, you must stop until he waves you on to proceed. You could have been hit or killed by a piece of equipment!
Katie:
You MUST stop until the green Go sign is displayed.

By driving through you are putting the life's of EVERYONE working on that site at severe risk – how would you like to go and tell the family of the construction worker that he/she is dead because some brainless idiot jumped the stop sign, that's what the police have to do EVERY day.

STEPHEN:
That sign has the same meaning as a traffic light. It isn't like a stop sign at a junction. There was probably another guy along the road holding a sign that said "GO" to traffic coming the other way.
You're dangerous to be on the road.
Ianab:
The stop / go sign is like a traffic light. One side is Red with a STOP on it. The other is Green with the word GO in large friendly letters.

The guy holding the sign is doing it for a reason.

The maybe the road is only one lane temporarily.
They may be blasting.
They may be replacing a bridge.
There might be freaking huge hole in the road
They might be felling trees across the road.

You get the idea?

Seriously, where did you get your licence, and what else don't you know that you should?

Dan B:
A "flagman" holding stop sign is treated differently than a normal stop sign. In that situation, you stop and wait until the hot place freezes over or the flagman signals you to proceed. S/He will turn the stop sign around and you'll see a "Slow" sign – which does not mean resume the posted speed limit.
Barry:
As others have said, stay stopped until the sign is flipped. These are usually used when construction narrows the road to one lane that is shared by both directions of traffic. When the lane is being used for traffic in the opposite direction, you have to wait.
StephenWeinstein:
You are supposed to stop, and wait, and stay stopped until the construction worker turns the sign around and shows you the other side (which says "slow") and then go slowly.
Ron:
So, what have we learned? Stop and stay stopped until they flip the sign around to the "slow" side and they wave you through. Lucky for you there wasn't a cop watching.

On a side note, you aren't anywhere near the first idiot driver that flagger has seen