Qi I Yang

US Patent:

8484002, Jul 9, 2013

Filed:

Dec 21, 2006

Appl. No.:

11/614617

Inventors:

Qi Yang - McLean VA, US
Howard Slavin - Newton MA, US
Andres Rabinowicz - Newton MA, US
Simon Olsberg - Newton MA, US
Mary LaClair - Cambridge MA, US
Jonathan Brandon - Newton Centre MA, US

Assignee:

Caliper Corporation - Newton MA

International Classification:

G06G 7/48

US Classification:

703 8, 701409, 701428, 701532, 701426, 701301

Abstract:

Systems and methods for, inter alia, geographically based analyses of traffic being carried over a wide scale traffic network. The systems integrate geographical information systems (GIS) with traffic simulation processes to allow a user to analyze traffic patterns and loads at specific geographic locations of regions. Additionally, these systems allow for traffic analysis over a wide scale traffic network that may encompass the traffic network that exists within a geographic region and can include, as examples, the traffic networks that span across a city, that interconnect cities, that interconnect states and that run across multiple states. To this end, the systems include traffic simulators that can adaptively or controllably select between multiple traffic simulation models for simulating traffic across different segments of the traffic network. The different models provide varying levels of granularity for measurements of geographical location of a vehicle traveling over the traffic network.

US Patent:

20020198694, Dec 26, 2002

Filed:

Jun 24, 2002

Appl. No.:

10/179643

Inventors:

Qi Yang - McLean VA, US
Howard Slavin - Newton MA, US
Kjartan Stefansson - Arlington MA, US
Andres Rabinowicz - Newton MA, US
Simon Olsberg - Newton MA, US
Mary LaClair - Cambridge MA, US
Jonathan Brandon - Newton Centre MA, US

International Classification:

G06G007/48

US Classification:

703/006000

Abstract:

Systems and methods for, inter alai, geographically based analyses of traffic being carried over a wide scale traffic network. The systems integrate geographical information systems (GIS) with traffic simulation processes to allow a user to analyze traffic patterns and loads at specific geographic locations of regions. Additionally, these systems allow for traffic analysis over a wide scale traffic network that may encompass the traffic network that exists within an geographic region and can include, as examples, the traffic networks that span across a city, that interconnect cities, that interconnect states and that run across multiple states. To this end, the systems include traffic simulators that can adaptively or controllably select between multiple traffic simulation models for simulating traffic across different segments of the traffic network. The different models provide varying levels of granularity for measurements of geographical location of a vehicle traveling over the traffic network. Thus portions of the traffic network that are to be analyzed more closely can use the traffic simulator model with the highest degree of granularity, while traffic patterns across other areas of the network may be modeled with lower granularity models that may provide for computational efficiency.

US Patent:

20180299290, Oct 18, 2018

Filed:

May 4, 2018

Appl. No.:

15/971010

Inventors:

- Newton MA, US
Qi Yang - McLean VA, US
Daniel Morgan - Roslindale MA, US
Andres Rabinowicz - Newton MA, US
Jonathan Brandon - Newton Centre MA, US
Ramachandran Balakrishna - Acton MA, US

International Classification:

G01C 21/36
G08G 1/01
G01C 21/34
G08G 1/0967

Abstract:

A 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 the 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 may 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, at least one of (a) altered road geometry, (b) altered traffic signal settings, such as traffic signal timing, or (c) road pricing.

US Patent:

20140278052, Sep 18, 2014

Filed:

Mar 14, 2014

Appl. No.:

14/210673

Inventors:

- Newton MA, US
Qi Yang - McLean VA, US
Daniel Morgan - Roslindale MA, US
Andres Rabinowicz - Newton MA, US
Jonathan Brandon - Newton Centre MA, US
Ramachandran Balakrishna - Acton MA, US

Assignee:

Caliper Corporation - Newton MA

International Classification:

G01C 21/34
G08G 1/00

US Classification:

701400

Abstract:

A 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 the 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 may 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, at least one of (a) altered road geometry, (b) altered traffic signal settings, such as traffic signal timing, or (c) road pricing.