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In the part one.

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We have implemented the vehicle counting.

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In the second part, I will add the speed estimation port in the that script as well.

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So first of all, we will write declare a variable speed line queue.

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So when we have the estimated speed, we will append the speed into this dictionary so that we can further

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estimate the speed of the vehicle.

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So now we need to create a function by the name estimate speed over here.

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Define estimate speed.

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And it.

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Report it will take.

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Reverse location one and location two.

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Okay, so what are these?

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Let me tell you.

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So the input it will take these two variables the the first and the second point of the trail.

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So what does it mean that it will take this first point of the trail and the second point of this trail?

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Okay.

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Basically, the trails are created when we basically you can say that when we append the center coordinates

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of the bounding box in each frame.

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So in this way, the trails are created.

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So we are taking the first coordinate and the second coordinate of this trails.

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Okay, so here we are in location one and location two and then click on Enter.

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So first we need to find the distance in pixels.

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So what is distance in pixels or how it is calculated?

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So to calculate the distance in pixels, we will use a klodian formula.

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So this write a distance formula.

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So when I go to the images over here, so this is the formula we have for Euclidean distance formula,

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which is x two minus x one over square plus y two minus y one over square.

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So I will just write this formula over here.

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So first we need to define the square root mat, dot, square root.

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Then we need to have the power.

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So to do this we will write mat.

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Okay.

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What I'm doing now Math Dot P.O.W..

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So now I will write allocation to basically it's x two minus x one.

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So it's zero.

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Then I will write.

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Just give me a minute to set this.

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Then in the next step, I will write.

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Minus location.

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One zero.

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Next.

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What I will do is.

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So here we need to define the power of two.

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So it means power.

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So as you can see that here we have the power of two.

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So here I have written two.

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So in that case, if there is power of 3 or 4, I will just write over here.

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So just come over here.

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Then I will write.

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Nice net dollar.

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IOW, then it is location.

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Rule one minus.

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Vacation.

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One.

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One.

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Two.

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So here I've.

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Here I've written the distance in pixels in the form of occlusion distance formula.

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So next we need to calculate the pixel parameters.

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So here I will take the pixel about pixel fixed value of pixel per meter.

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But if you want to get more adequate results or more better vision, you can make it dynamically.

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Bowser.

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Trembler

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Westminster parameter.

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But here the x value of pixel per as in here.

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Then we will calculate the distance in meters, which will be.

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Distance in pixels.

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Distance in pixels.

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Multiply by sorry.

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Distance in pixels divided by pixel.

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Parameter.

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Then I will declare a time constant.

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So this is basically.

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You see that basically fixed value which will contain 15 cross 3.6.

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So we can.

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The more elevated result you can get.

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3.6 is also the constraint which we can adjust as one over.

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So now we will calculate speed.

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So let me share what is the formula speed eight point.

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So speed is equal to distance over time.

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Okay.

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So what I will do over here is the distance in meters.

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It's overtime.

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But here what we're doing, we are getting time constraint.

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So we have basically frequency in this case.

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So.

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Frequency is equal to one by T.

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Okay.

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So we will just multiply the under time constraint because time constraint in the form of fancy.

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So we are just multiplying that time constraint with the distance.

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Okay.

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If we have a time then we should divide it so it will return here and speed.

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Okay.

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So we have created a function for the speed estimation.

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The next thing we need to do is we need to add this call, this function where we need to call this

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function.

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Just checking it because I might forgot something.

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Okay, so we now need to call this function over here.

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I will write object speed is equal to estimate speed, which are the function which I have created.

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Then I will pass that vehicle ID.

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One then will pass the data.

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ID zero as well.

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Over here.

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IDs zero.

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And then I will press enter and bound my speed with the.

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I will just append these values into this.

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Object be okay?

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So I have done this.

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So here we are appending the object speed values into this dictionary so that we can get where the speed

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of each of the detected object.

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Okay, so I think that's enough.

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Plus we need to make that change.

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One thing over here because we need to display this right here.

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I, if we get the speed in labor, is equal to labor.

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Thus.

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Thus we just had the space over here.

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Basically, we are we are adding the speed value with the we can say that with the label.

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So we are.

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So basically, let me show you the speed value will appear with this label like here with this label

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in the with this label over here.

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So we are just defining this over here some.

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Viewed by In-q.

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ID or an ear.

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Then what I will do is next.

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Just divide this over here.

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Divide by the length.

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Then I will write.

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Just speed.

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Then Q over here.

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Then I will write.

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Well, here I have.

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I think I'm just missing one bracket over here.

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Let me see what I am missing.

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Okay, then.

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Space.

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Okay.

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I think that's fine.

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I'm not missing anything just so I will write km over hours, so I think that's fine.

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So in that case, if you don't have the speed, so then I will write the accept over here and we will

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just pass.

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Okay.

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So I think I'll have written this and it will be working.

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Should work.

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Fine.

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Just run the script now and see what results do we actually get.

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So just running.

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Now we have added the destination code as well, but let's see whether we are getting the speed or not.

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It might take a few minutes to run.

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So you may be seeing the output in the parallel as well.

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Okay.

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So on a toybox have passed.

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We are not able to see the currently the speed.

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But I think when this vehicle crosses this line, we will able to see the speed.

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Let's see when this the train crosses this line because we have a higher return.

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When the line intersects, then we will get better speed.

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But if you want to get greater speed before the line intersection, just move this from here to above

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this.

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Okay?

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So just checking.

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Okay.

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And.

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So it is a bit slow.

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And yes, it's going very slow.

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So when let's see, when this intersects, doesn't get the speed or not.

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So it might take a few seconds more.

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Okay.

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So.

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It just crossing, So.

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Let's see.

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What results do we get?

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It might take a few more seconds.

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Then the previous one.

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So let's see.

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Okay, so we're just crossing the line over here.

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And now it should when the trails intersect with this line, I think there we should have the count

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and the speed estimation should be done and should be should.

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Okay.

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So not okay.

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What does this happen?

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Okay, so there is an error.

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Let me see and fix this.

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I have found out the mistake.

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Basically, I have not initialized over here.

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This line queue ID is equal to list over here.

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So this was a mistake which I was making.

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So let's rerun the script again.

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Now reading the square.

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And so let's see what results do we get?

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Or if there is an error, we will definitely fix this.

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So it might take some time to execute.

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So please bear with me.

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Okay.

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So it might take some time.

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So.

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Or as this vehicle crosses this line, let's see what it does.

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It goes.

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Okay.

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So you can see there.

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Then this closes this line.

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Okay.

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So consider.

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Being.

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So when this vehicle crosses the line, we should have a speed of the vehicle over here with that truck

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at label and.

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Us, there should be the count as well.

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I hope it will work by now.

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We will not see the show like we see previously.

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So let's sing.

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It's around.

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You can see that we get this crossing line, which is restricting now.

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Okay.

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So we have the vehicle count here as well.

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You can see it.

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Plus we have the speed of the vehicle as well.

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That's cool.

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So now let's see for the other vehicle.

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The mistake was only that we have not initialized the list.

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So that was the only the mistake which we were making.

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So I have just added the list.

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And now you can see that the results are very perfect.

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So by just adding a list, you can see that.

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Result are awesome.

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So now let's see when this vehicle crosses this line.

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And we can have should have a vehicle count here as well, and it should increment as well.

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So now we can see that the vehicle is going to cross the line.

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Okay.

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So when you can see that we have a car one as well and we can see the speed as well.

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So that's all from this tutorial.

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See you all in the next tutorial.

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Till then, bye bye.