Attention: Telraam needs time to calibrate. During the registration process, you will probably have noticed this disclaimer. But what does it mean? And why does Telraam need time to calibrate?
Why the need for calibration?
In practice, the disclaimer points to the fact that Telraam data is not reliable in the first hours and days after installation of the sensor. During the first few days of counting, your Telraam lacks sufficient data to establish a difference between cars and large vehicles (known to us geeks as the “cut-off”). This is why, in the first days, Telraam uses a general rule to establish the cut-off. Because this rule is general and not adapted to your specific Telraam, the resulting data is usually incorrect.
How long does Telraam take to calibrate?
Over time, as your Telraam keeps counting, data reliability will automatically improve. This will take around a week.
Please note that in winter, when days are shorter, Telraam collects less data and the calibration period takes longer: up to three weeks.
Cars and large vehicles
In some cases, even after a calibration period, Telraam does not correctly distinguish between cars and large vehicles. The number of cars can be underestimated and the number of large vehicles overestimated, or vice versa. The sum of both vehicle types, however, is usually correct.
At this moment in time, the car/large vehicle split point is set roughly around pickup trucks. It is, however, possible that large cars (SUVs, pickups,…) are counted as large vehicles and small, low-slung vans are counted as cars. Click here to learn more about how Telraam categorizes vehicles.
In summary, we ask you to be conscious of the fact that Telraam’s large vehicle count data does not have the same accuracy as the data on cars.