Mining large amounts of traffic data to find the measurements or raw GPS points related to a single corridor, or connecting two gates, may be both cumbersome and time consuming - unless you use the Corridor Travel Times tool from Hermes Traffic Intelligence. The tool lets you describe the corridors you are interested in, perform the necessary data queries, and will let you know when the results are ready.
The tool consists of three parts:
- A web-based user interface (the Corridor Tool), that will allow you to describe the corridors on a map. The description is accompanied with a number of settings, indicating e.g. the period you are interested in, the type of days, or the vehicle type. Your description, known as a job, may be stored locally, and can be re-used a number of times with different settings.
- The job manager (called HTI Engine), which is contacted when a job is submitted via the user interface. Since it may take several hours to perform the queries associated with a job, the job manager controls new jobs when they arrive, and make sure to execute them in the correct order. If need be, the manager can be configured to have e.g. multiple queues for jobs with different priorities or estimated run-times.
- The query engine (called Trip Validator) that will perform queries on the raw data based on the corridor definitions in the current job. When querying raw GPS data, data may be accessible through a database interface or simply by having data stored in text-based files. The query engine may be configured to lookup data in various formats.
For strategy and science
For now the tool has mainly been applied to strategic and scientific purposes. Within traffic strategy the applications have been ranging from measurements on turning times in intersections to speed profiles for longer stretches during the day. Scientific applications have mainly been to investigate the differences between datasets describing travel in the same area and time period but in different ways.