With the Travel Times Engine, you can calculate travel times for your traffic network using configurable data collection methods and algorithms.
Travel time calculation algorithms
The Travel Times Engine can calculate travel times along a traffic link using the following algorithms:
- Basu-Meckesheimer algorithm
- A mean-based algorithm. It is the easiest algorithm to configure and recommended for most uses.
- Median Absolute Deviation (MAD) algorithm
- A median travel time-based algorithm that uses the Median Absolute Deviation to remove outlier data. It is more responsive than the Basu-Meckesheimer algorithm, but requires a lot of trial and error to properly tune.
- Weighted average algorithm
- A mean-based algorithm that provides a weighted average of traversals, without filtering for outliers. It is useful for comparisons or in combination with other algorithms.
- Constant time algorithm
- An algorithm that ignores all data inputs and returns a constant number of seconds for the traffic link’s travel time. It is useful for traffic links that are too short to be effectively calculated using Bluetooth detections.
- Continuation traffic link algorithm
- An algorithm that uses the speed data of a related traffic link to calculate travel time, rather than detection data and traversals. It is useful for dealing with a detector failure, or a portion of roadway that is past or prior to an instrumented section of roadway.