Lane-level vehicle navigation for vehicle routing and traffic management
First Claim
1. A traffic signal system comprising:
- a computing unit including;
a simulation module that performs, faster than real time, microsimulation of individual vehicles in a traffic stream, anda lane-level route optimizer that evaluates predicted conditions simultaneously along multiple alternative candidate paths, including at least one multi-lane path segment, from an origin to a destination as determined by said simulation module, and determines predicted performance measures; and
a traffic signal controller that receives instructions from the computing unit, based on the predicted performance measures, and adjusts traffic signals for managing traffic.
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Abstract
Lane-level vehicle routing and navigation apparatus includes a simulation module that performs microsimulation of individual vehicles in a traffic stream, and a lane-level optimizer that evaluates conditions along candidate paths from an origin to a destination as determined by the simulation module, and determines recommended lane-level maneuvers along the candidate paths. A link-level optimizer determines the candidate paths based on link travel times determined by the simulation module. The simulation may be based on real-time traffic condition data. Recommended candidate paths may be provided to delivery or service or emergency response vehicles, or used for evacuation planning, or to route vehicles such as garbage or postal trucks, or snowplows. Corresponding methods also may be used for traffic planning and management, including determining, based on microsimulation, (a) altered road geometry, (b) altered traffic signal settings, such as traffic signal timing, and/or (c) road pricing.
66 Citations
13 Claims
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1. A traffic signal system comprising:
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a computing unit including; a simulation module that performs, faster than real time, microsimulation of individual vehicles in a traffic stream, and a lane-level route optimizer that evaluates predicted conditions simultaneously along multiple alternative candidate paths, including at least one multi-lane path segment, from an origin to a destination as determined by said simulation module, and determines predicted performance measures; and a traffic signal controller that receives instructions from the computing unit, based on the predicted performance measures, and adjusts traffic signals for managing traffic. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A traffic signal control method comprising:
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performing, faster than real time, in a simulation module of a computing unit, microsimulation of individual vehicles in a traffic stream, and evaluating, in a link-optimizing engine, predicted conditions, simultaneously along multiple alternative candidate paths, including at least one multi-lane path segment, from an origin to a destination as determined by said simulation module, to determine predicted performance measures; and providing instructions from the computing unit to a traffic signal controller, based on the predicted performance measures, to adjust traffic signals for managing traffic. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification