LV13943B - Adaptive traffic light managerial system - Google Patents

Abstract

Invention relate to electrical engineering, particular to transportation sector. Goal of invention is to design traffic light managerial system to be capable adjust signal timing according to amount of requests coming from traffic participants and actual condition on street crossing. Goal is achieved so, that all vehicles are equipped with systems linked to communocation network. In this system all vehicles do information exchange announcing occupation of the lane. From here system do calculations to conclude about vehicle flow for a time period and adjust signals to provide maximum throughput of street crossing for highest flow.

Description

The invention relates to electrical engineering, in particular to the transport sector.

There is known a traffic control system with an inductive loop [1] or an optical sensor [2] as a participant in the determination of the fact of movement at an intersection. The main disadvantage of these systems is the inability to respond adequately to the flow of all road users, but only to those in the sensor's detection area.

A system [2] has been chosen as a prototype in which optical monitors are installed on the carriageways and sidewalks at the intersection to coordinate traffic lights. The main disadvantage of such a system is its complexity and instability in bad weather.

The object of the invention is to provide a system for controlling traffic lights at the request of road users and the real situation in the traffic area.

The goal is achieved as follows: In a system of intersecting traffic lights consisting of four traffic lights, each of which is accompanied by a control module with an electronically readable identifier, all traffic lights are initialized with the corresponding directional identifiers - lane addresses. The driveway is equipped with an RFID (Radio Frequency Identifier) medium containing the band address. The hardware installed in the traffic participant reads this information and rejects the presence of the wireless network to the oncoming traffic light. Since traffic lights are initialized only for their band, they only receive and decrypt information sent with the corresponding identifier. This makes it possible to determine the number of oncoming road users and switch signals, preferring the direction with higher traffic.

Fig. 1 shows a schematic diagram of an embodiment of the invention. Intersection of two carriageways with four identified traffic lights 1, 2, 3 and 4, whose lights are switched by a central control unit 5. Each traffic light has a built-in approach signal receiving unit 6 and each road user 7 has an approach signal rejection element 8. Each traffic light perception element node 6 is connected to the data processing input of central unit 5. The unit comprises a calculation unit 9, the results of which switch the signal control elements in the traffic light.

The system works as follows. In the initialization state, all traffic lights have a red light. The vehicle approaching the traffic light 7 with the rejection element 8 reports to the traffic light receiving unit 6 about the distance to the traffic light and the request to cross the intersection. Each traffic light receiver 6 rejects the request to the central control unit 5, which performs the necessary calculations at node 9 and instructs the order of the green light signal in directions depending on the number of requests and and the allowable waiting time.

Sources of information:

1. http://v3.espacenet.com/textdoc?DB=EPODOC&IDX=KR100317306B&F=0.

A method for detecting the speeding of a vehicle. Publication number: KR100317306B

2. http://v3.espacenet.com/textdoc?DB=EPODOC&IDX=DE102005060132&F=0. Traffic condition recognition adjustment method e.g. for traffic condition recognition, involves determining in vehicle, vehicle-referred measured variable. Publication number: DE102005060132.

Claims (1)

Claim An adaptive traffic light control system, which contains four synchronously switched traffic lights, is different in that all intersection traffic lights are initialized and contain: - intersecting vehicle-related signal reception elements from its traffic lane corresponding to its traffic light initial; - for the intersection traffic lights, the total calculation unit associated with the above reception elements and estimating the number of traffic-related vehicles in each direction, and - a switching unit which in turn is connected to the calculation unit and operates according to its signals.