Resources Contact Us Home
Browse by Category: Main > Communications
Class Information
Number: 340/920
Name: Communications: electrical > Traffic control indicator > Intersection normally under local controller > Controller responsive to traffic detectors > Plural cross highways at intersection each have traffic detectors > Density determines split
Description: Subject matter wherein the number of vehicles detected per unit time or area determines the percentage of a complete cycle allowed for a particular indicator.

Sub-classes under this class:

Class Number Class Name Patents
340/921 Extension of time 5

Patents under this class:

Patent Number Title Of Patent Date Issued
8471728 Traffic management systems and methods of informing vehicle operators of traffic signal states Jun. 25, 2013
8253592 External adaptive control systems and methods Aug. 28, 2012
8237589 Adjusting system and method for traffic light Aug. 7, 2012
8212688 Traffic signals control system Jul. 3, 2012
7663505 Traffic management device and system Feb. 16, 2010
6587779 Traffic surveillance method and vehicle flow control in a road network Jul. 1, 2003
5646639 Display device for vehicles Jul. 8, 1997
4370718 Responsive traffic light control system and method based on conservation of aggregate momentum Jan. 25, 1983

  Recently Added Patents
Computer program and apparatus for evaluating signal propagation delays
Light emitting device
Representing polarized light in computer models
Adaptive contact window wherein the probability that an answering user/expert will respond to a question corresponds to the answering users having response rates that are based on the time of
Reovirus for the treatment of cellular proliferative disorders
Ejection station
Live-attenuated compositions for bacterial infections
  Randomly Featured Patents
Strategies for high throughput identification and detection of polymorphisms
Method and apparatus for determining the sensitivity of inputs to a neural network on output parameters
Pipe for vacuum cleaner
Motor control circuit with current limiter and bypass switch
Precession diffraction charged particle beam system
Method of producing inflation film, apparatus therefor and molded articles thereof
[NiFe]-hydrogenases having an improved resistance to dioxygen, process for obtaining them and their applications
High resolution and flexible eddy current array probe
Fluorescent lamp and spotlight apparatus