CAM-69
Slip roads in and out
The junction seen from the pole on the embankment: one car is merging in from the entry slip road, another is leaving by the exit, and between them lies the painted hatched area of the diverge.
Turn on IRIS Vision
AI-generated image
What IRIS understands
What it recognises in this scene
- merging in
- exiting
- mainline
- articulated lorry
What this camera gives back
Nobody gets an alert here. Here you get numbers.
- 6.120+8%Vehicles in
- 5.740Vehicles out
- 08:00 – 09:00Junction peak hour
- 16%Share of mainline traffic
- 2 minQueue on the slip road
- 4Stops in the hatched area
The figures on this screen are an example from the illustration, not any client's measurement.
The series, not one figure
One number says nothing. A curve does.
Entries and exits by time slot
- Joining the road
- Leaving the road
| Slot | Joining the road | Leaving the road |
|---|---|---|
| 06 | 180 | 150 |
| 08 | 940 | 480 |
| 10 | 520 | 460 |
| 12 | 460 | 500 |
| 14 | 500 | 520 |
| 16 | 470 | 560 |
| 18 | 760 | 910 |
| 20 | 520 | 620 |
| 22 | 210 | 260 |
The figures on this screen are an example from the illustration, not any client's measurement.
How the counting works
Counting is not something you ask for. You draw a line.
There are two lines and one area drawn on the image. One line crosses the entry slip road and the other the exit: everything that crosses them is added up, so you know how many people use the junction and at what times. The area is painted over the hatched zone of the diverge, that striped triangle where nobody should ever be, and it measures how long a vehicle stays there. None of this can be asked for in a sentence: the line and the area are drawn once onto the frame and stored, and that is why one month's figure can be compared with the next.
- entry line · Counting line
- exit line · Counting line
- hatched area · Dwell zone
And also, one rule
You decide once. IRIS applies it always.
If
a vehicle stops inside the hatched area of the diverge
And alsoa vehicle enters the exit slip road the wrong way
Then
- alert the control room with the camera and the video
- light up the sign on the stretch before
- send the patrol to the junction
The instruction that set it up«Tell me if a vehicle stops inside the hatched area or if someone enters by the exit the wrong way.»
What changes
What changes for whoever runs the road
Nobody measures the junction, and yet that is where a motorway's problems gather. The engineer who has to decide whether to lengthen the acceleration lane or change the signing of the exit has been doing it for years with one week of counts and with what drivers tell him. With two lines and one area he knows how many come in, how many go out, when the junction fills up, what share of the road's traffic uses it and how long there is a queue on the slip road. And from the same camera he gets an alert when someone stops in the hatched area or drives in the wrong way up the exit — the two manoeuvres that end in a head-on crash.
What people usually ask
What is the point of counting a junction?
So that decisions are made with data instead of impressions. Knowing how many vehicles come in and go out, at what times and what share of the road's traffic that junction represents is what tells you whether the acceleration lane has become too short, whether the exit needs another sign further back, or whether the queue on the slip road is reaching the mainline. Without that figure the argument is settled by seniority; with it, it is settled by what actually happens at that point.
Why raise an alert for a car stopped in the hatched area?
Because nobody should ever be there. The hatched area of a diverge is the piece of asphalt that separates the exit from the mainline: whoever stops there, almost always because they hesitated and changed their mind about leaving, ends up stationary between two streams of traffic and in the worst possible place to be seen. That is why this manoeuvre produces an alert and not only a number: the operator has to be able to send someone and light up the sign upstream.
How is the queue on the slip road measured?
By counting the vehicles that pile up on the slip road and measuring how long that build-up lasts. The camera sees how many cars are stopped or barely moving while waiting to merge, and the figure that comes out is the time the slip road spent queuing in that hour. It is not a measurement of each vehicle's speed: it is what can be seen in the picture, which is the queue and how long it takes to clear.
Demo · IRIS at work
We won't just tell you. We'll show you.
It is a summary of the real screen: it plays by itself, step by step, and shows only the path of one case. The actual tool has far more than fits in here.
- The alert fires
- It lands in the tray
- You open it
- You confirm or dismiss
Next step
How long does it take to find a hand played two hours ago?
12 cases: 9 raise an alert when something happens and 3 only measure. You see each image as it is, and then with what IRIS understands on top.
What does a shopping centre see beyond the visitor count?
12 cases: 4 raise an alert when something happens and 8 only measure. You see each image as it is, and then with what IRIS understands on top.
And the best part
One camera,and you already have a watchman. Four thousand cameras, and you have four thousand watchmen.
None of them tires, none of them looks away and none of them works shifts. And there is nothing to install: the cameras you already have can start understanding what they see.
Tell us your problem and we will say whether IRIS understands it, or not yet.
We reply the same working day.