Right-of-Way Imaging (ROW)

ROW Imaging is a system designed for collection of digital images from a vehicle. The images are taken at fixed distance or timed intervals, regardless of the speed of the recording vehicle. This way, the roadside inventory can be documented. The system can be operated as a standalone system or integrated with other equipment as part of a TSD or Profiler vehicle or together with a LaserProf.

Roadside inventory

Signs and other roadside inventory disappear or become damaged in many ways. Manual recordings on the road have a number of disadvantages. ROW Imaging provides permanent documentation in sufficient quality to prevent misidentification. By comparing the current images with images from the previous recording side-by-side, differences are easy to spot.

Besides a camera pointing forward, an additional camera can be installed pointing to the rear, which allows all signs from the opposite lane to be read without traveling the road twice.


An odometer is mounted on one of the wheels of the vehicle, triggering the cameras through control electronics at fixed intervals. The distance between pictures can be selected by the user, and typically is 5m or 10m. This allows the measuring vehicle to follow the speed of traffic (up to 135 km/h with an image every 5 meters). The free choice of camera allows ROW Imaging to be adapted to many specific applications, but a typical configuration provides images in 1920 x 1200 pixels with 24-bit color with an image every 5 meters. The images from the cameras are tagged with a time stamp and the distance travelled, and they are immediately available on a laptop, where they can be compressed. Greenwood Engineering can also add an external GPS receiver and antenna to make the position of the images easier to determine. Any GPS (with 1PPS output) can be used with the system.

Synchronized data

Post processing software synchronizes each image with other measurements made in the same vehicle based on the high precision odometer tags. This could be information such as road profile and crack detection.

With coordinates, the images can be added to any GIS system.

Multiple cameras

ROW Imaging supports multiple cameras and the number, type and placement of the cameras can be selected or changed after purchase

All cameras are user selectable and they are mounted with adjustable brackets, to let the operator adjust the angle of view, giving both flexibility and the ability to read small signs at great distances. 

Cameras can be mounted in a separate camera house on the top of the vehicle for flexibility, or inside the vehicle for maximum protection.