Location guidelines for Telraam S2 Outdoor

Why this is important

To collect accurate and reliable traffic data, your Telraam S2 Outdoor needs to be installed in the right spot. A poorly chosen location can lead to missed or misclassified objects.

This guide helps you select the optimal installation site by covering key aspects like the ideal height, angle, and distance from the area you want to monitor.

Location and installation requirements

1️⃣  Clear, unobstructed view
No trees, bushes, banners, or signs in the way. The device needs a clear line of sight to the full area you want to monitor.

2️⃣  No intersections in sight
Avoid pointing the Telraam at crossroads or junctions.

3️⃣  Perpendicular
The device should face the street head-on — not diagonally. Objects should move from left to right (and/or vice versa) across the frame.

4️⃣  Open sky if solar-powered
Using a solar battery kit? Make sure there is nothing (like buildings or trees) casting shade on the panel.

5️⃣  Minimum height of 3 meters
The device should be at least 3 meters off the ground to capture a broad and accurate field of view and to avoid the risk of vandalism.

6️⃣  Distance to area of interest - at least 1/6th of the height, but preferably minimum 2 meters
The Telraam S2 Outdoor can’t see straight down, it has a 10° angle blind spot. So don’t place it too close to the area you want to monitor. Example: If installed at 3 meters high, keep it at least 0.5 meters back from the start of the monitoring area. An overly top-down view can also lead to missed detections, therefore we also suggest keeping a distance of minimum 2 meters.

7️⃣  Max. distance
25 meters from the furthest sidewalk (if counting pedestrians)
40 meters from the furthest traffic lane (if pedestrian counting isn’t needed)

8️⃣  Correct viewing angle
Aim for a 45° angle toward the middle of the to be monitored area. Anywhere between 30° and 60° is acceptable.

9️⃣  Cellular network connectivity
The Telraam S2 uses a SIM card, so cellular network (LTE-M or NB-IoT) connectivity is required.

Calculate your own specific ideal distance and height

To get the best possible data, your Telraam should ideally view the center of the monitored area ( (e.g., sidewalk + bike lane + road) at a 45° downward angle. This keeps the objects well within the device’s field of view and out of its blind spot.

This 45° angle is obtained when the installation height matches the horizontal distance to the center of your monitoring area. In case this height is unachievable due to the available infrastructure, a height resulting in a central viewing angle inside of the 30-60 degree range is acceptable. We advice a minimum height of 3 meters to prevent vandalism.

The device has a blind spot extending to ~10 degrees from straight downwards, therefore it cannot count objects that are right underneath it. This blindspot distance is approximately 0.5 meters when the device is installed at 3 meters height, and 1.75 meters when installed at 10 meters. This should be taken into account when choosing the distance from the edge of the monitored area.

The region of interest (ROI) setting upon the registration of the installed Telraam sensor will provide options to fine-tune the monitoring area, but the guidelines of defining distance and height should still be taken into consideration.

Examples