Overview
The Trajectory Processor is an essential part of the analytical framework developed under the SHRP2 L04 project to produce travel time reliability performance measures from planning and simulation model outputs. It calculates and visualizes travel time distributions and ssociated reliability indicators (such as 95th Percentile Travel Time, Buffer Time Index, Planning Time Index, etc.) at link, path, OD and network levels. These distributions and associated indicators are derived from individual vehicle trajectories, defined as sequence of geographic positions (nodes) and associated passage times. These trajectories are obtained as output from particle-based microscopic or mesoscopic simulation tools. Such trajectories may alternatively be obtained directly through measurement (e.g. GPS-equipped probe vehicles), thereby enabling validation of simulation tools.