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The source code and documentation for the Measures Estimation software from the BSM Data Emulator project has been released onto the OSADP and is now available for download. To download this application, you need to sign in as a registered user. To download the software please click here. If you do not have an account, you may submit an account registration request by completing theĀ registration form.

This software package contains two separate sets of software. The first is used to estimate seven transportation system performance measures using data from connected vehicle messages (such as the SAE J2735 Basic Safety Message):

1. Queues at Known Locations
2. Queues at Unknown Locations
3. Cycle Failures
4. Shockwaves
5. Travel Time
6. Delay
7. Space Mean Speed

Measures estimation can be performed using any type of connected vehicle data, as long as it has the basic key elements as detailed in the Measures Estimation software user guide, which is included in the download package. The Measures Estimation software includes individual program files to estimate each of these performance measures. Connected vehicle data for use with these programs can be generated from input from a traffic simulation model using the Trajectory Converter Analysis (TCA) tool which is also available for download on the OSADP.

To assist in the assessment of the accuracy of these performance measures derived from connected vehicle data by the Measures Estimation software, another set of programs are included in the package that allow for a comparison of these estimated performance measures to the measures determined by using the traffic simulation model data directly.

The performance measures generated from traffic simulation models use data (vehicle position, speed and acceleration/deceleration) generated every 0.1 seconds by all vehicles, rather than only connected ones. The measures generated from traffic simulation models provide the most accurate representation of system performance. Depending on the protocol being used to generate and send connected vehicle related data, the messages generated and transmitted from connected vehicles may be less frequent and with inherent time lags in delivery when compared to the data directly from the traffic simulation model.