California Department of Transportation

Sensors Research and Evaluation

All the software and training material will be on one CD that can be taken to the field to pictorially demonstrate step-by-step operation. There are two separate software modules; one to setup and configure the RTMS (if desired), and the second to perform the video based "ground truth" functions.

The VideoSync ground truth software contains a number of functions. First, the video and data file are selected and linked. This happens automatically if this systems hardware is used to record all data, but it can be done manually if the video is digitized through another source. The video can be played forward or back at any speed, or jumped to any time frame.

Please click here for the VideoSync Videos.

The video scene geometry must be determined. This requires determination of the pixels-per-meter or pixels-per-foot ratio, which eventually will be determined automatically, but for now must be manually entered. Lane lines are drawn in to allow the site geometry to be determined. Each detector element from the data file is given a name and color. Then a colored translucent box representing each detector is placed on the appropriate place in the lane of the video. When place correctly, each box should change color each time a vehicle passed underneath.

The "ground truth" mode involves clicking on the front and back of each vehicle in one frame, and then on the front or back in a different frame at a different time. From this, the length and speed are determined. "Ground truthing" can be done for any or all lanes or time periods at the user's discretion. Each "ground truthed" vehicle will then generate the ground truth data for each detector in its lane, which is in essence what a "true" or "100% accurate" detector should see at that detector placement geometry. A vehicle can be re-done if its speed or length appears inappropriate. Once a lane has been ground truthed for a given time period, there is a quick "review" mode to make sure all vehicles were captured and not double counted from the video.

At any point, the raw detector data, or the equivalent "ground truth" data, can then be compared graphically side by side between different lanes of different detectors. This is very useful in diagnosing (and subsequentially fixing) the timing problems that lie at the root of many detector errors.

Finally, the volume and occupancy data can be aggregated into time periods of the user's choosing. This allows direct comparison of, for example, the 30 second data for a given detector vs. the true ground truth data. The tabular data can then be exported to Excel or other programs for graphing or further analysis.

A somewhat crude demonstration of many of the software capabilities are available here. To view this, you will have to have the free QuickTime 6 player linked to your browser. This is available here, or you can contact your system administrator for it.

RTMS Radar Setup Software

Separately from VideoSync, DRI has developed a new setup procedure and software for the RTMS Radar unit. RTMS is perhaps the second most popular detector in use by Caltrans, but setting it up correctly currently takes quite a bit of time and effort. The DRI software does things like automatically find lanes, and play sounds each time vehicle passes by. This allows adjustment of the optimum sensitivity and fine-tuning to be set quite expeditiously. A demo of this software is forthcoming.