System for traffic signals for one-side passing

DETAILED DESCRIPTION Accordingly, it is a main object of the present invention to provide a system for traffic signals for one-side passing which can reduce the waiting time of vehicles and allow them to efficiently pass a road section under construction.
It is another object of the present invention to provide a system for traffic signals for one-side passing which can ensure the safety passage by vehicles in the road section at the time of signal changes.
It is also an object of the present invention to provide a system for traffic signals for one-side passing which can allow vehicles to efficiently pass the section even in the case of trouble in detector means and the night having less traffic density.
It is further an object of the present invention to provide a system for traffic signals for one-side passing which can allow vehicles entering the section immediately after the signal change from green to red to safely pass the section.
Additionally, it is further an object of the present invention to provide a system for traffic signals for one-side passing which can allow vehicles to safely and efficiently pass the section by shortening the uniformly red time of the signals in the case that vehicles do not pass the section immediately before the signal changes from green to red.
In accordance with a major feature of the present invention, there is provided a system for traffic signals for one-side passing comprising: two-position signals provided at both ends of a road reparing section through which vehicles from up lane and down lane alternately pass; detector means for detection of passage of vehicles which are provided at both ends of the road reparing section, each corresponding to each traffic signal; sensitive controller device for control of green or red lighting time and switching of red or green indication of the traffic signals based upon detection signals by the detector means, said sensitive controller means comprising: a lighting time setting means by which minimum and maximum green time of the traffic signals can be set; a lighting time controller means which extends green lighting time by unit extension time with input of detection signal concerning the vehicles within a switch holding time prior to lapse of the minimum green time, and further extends the green lighting time by each unit extension time up to the maximum green time with another input of detection signal within the unit extension time