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
Systems and methods for adaptive error thresholds or adaptive modulation schemes based on atmospheric conditions
Method for the hydrolysis of substituted formylamines into substituted amines
Method and system for detecting data modification within computing device
Thermally efficient busway
Compositions and methods for concentrating and depleting microorganisms
Single well reservoir characterization apparatus and methods
Luggage cart
  Randomly Featured Patents
Polynucleotide molecule from Haematococcus pluvialis encoding a polypeptide having a .beta.-C-4-oxygenase activity for biotechnological production of (3S, 3'S) astaxanthin and its specific exp
Exit device having length adjustment means for its concealed vertical rods
Apparatus for refilling inkjet cartridges and methods thereof
Window safety bar unit
Vacuum cleaner
Single runner sled
Hydrogenated lithiated copolymers grafted with organic nitrogen compounds as viscosity index improvers having dispersant properties
Computer speedometer for bicycle
Process for treatment for high speed photographic materials
Self-injurious behavior inhibiting system