Stephen S Penrod

US Patent:

8103436, Jan 24, 2012

Filed:

Sep 24, 2008

Appl. No.:

12/236698

Inventors:

Reggie J. Chandra - Leawood KS, US
James W. Bley - Lawrence KS, US
Stephen S. Penrod - Kansas City MO, US
Arthur S. Parker - Lawrence KS, US

Assignee:

Rhythm Engineering, LLC - Lenexa KS

International Classification:

G08G 1/01
G08G 1/08
G08G 1/081

US Classification:

701117, 340911, 340912

Abstract:

An external adaptive control system controls a traffic signal at a critical intersection that has a most conflicting volume of traffic among volumes of traffic at intersections in a traffic network. The external adaptive control system determines a plan identifying a guaranteed green light time and a minimum green duration and a period for the plan. The external adaptive control system determines, based on the plan, a non-linear schedule with one or more states corresponding to one or more individual phases with each state having a state start time and a state duration. Queues for individual traffic movements at the critical intersection also may be used to determine the non-linear schedule. The adaptive external control system controls the traffic signal according to the non-linear schedule. The external adaptive control system transmits its plan to one or more other external adaptive control systems for other intersections.

US Patent:

8253592, Aug 28, 2012

Filed:

Sep 24, 2008

Appl. No.:

12/236693

Inventors:

Reggie J. Chandra - Leawood KS, US
James W. Bley - Lawrence KS, US
Stephen S. Penrod - Kansas City MO, US
Arthur S. Parker - Lawrence KS, US

Assignee:

Rhythm Engineering, LLC - Lenexa KS

International Classification:

G08G 1/07

US Classification:

340917, 340907, 340913, 340920, 340921, 701117

Abstract:

An external adaptive control system and method control a traffic signal controller assembly. The external adaptive control system determines a non-linear schedule with one or more states corresponding to one or more individual phases with each state having a start time and a duration. The external adaptive control system generates presence data for reception by the controller assembly for each state and its associated duration.

US Patent:

20050162425, Jul 28, 2005

Filed:

Jan 23, 2004

Appl. No.:

10/763476

Inventors:

Henry Kyle - Coquitlam, CA
Stephen Penrod - Kansas City MO, US

International Classification:

G06T011/20

US Classification:

345442000

Abstract:

Systems and methods are provided for dynamically displaying a projection sensitive path on a two-dimensional representation of a three-dimensional object. In one aspect, a path is dynamically displayed between at least two geographic locations. A two-dimensional representation of three-dimensional geographic data is displayed, and a user input is received specifying an initial location on the two-dimensional representation. Additional user input is received specifying a number of intermediate locations and terminating with a final location. While receiving the additional user input, either a great circle path or rhumb line is dynamically displayed extending from the initial location toward each of the intermediate locations and ultimately terminating at the final location.

US Patent:

8050854, Nov 1, 2011

Filed:

Sep 24, 2008

Appl. No.:

12/236701

Inventors:

Reggie J. Chandra - Leawood KS, US
James W. Bley - Lawrence KS, US
Stephen S. Penrod - Kansas City MO, US
Arthur S. Parker - Lawrence KS, US

Assignee:

Rhythm Engineering, LLC - Lenexa KS

International Classification:

G06G 1/00
G08G 1/07

US Classification:

701117, 701118, 701119, 340917, 340918

Abstract:

An adaptive control system controls a traffic signal at a critical intersection that has a most conflicting volume of traffic among volumes of traffic at intersections in a traffic network. The adaptive control system determines a plan identifying a guaranteed green light time and a minimum green duration and a period for the plan. The adaptive control system determines, based on the plan, a non-linear schedule with one or more states corresponding to one or more individual phases with each state having a state start time and a state duration. Queues for individual traffic movements at the critical intersection also may be used to determine the non-linear schedule. The adaptive control system controls the traffic signal according to the non-linear schedule. The adaptive control system transmits its plan to one or more other adaptive control systems for other intersections. The other adaptive control systems determine other plans based on the plan from the adaptive control system and an expected travel time between the critical intersection and the corresponding intersection.