Traffic Control Center

Pavement Markings

Photograph of car

Promotes Realization of a Safe and Comfortable Traffic Environment

The Kanagawa Prefectural Police are working to reduce the problems associated with the automobile society such as traffic accidents and congestion as well as environmental pollution. To do so, in 1991 it introduced a traffic control system that will allow the gathering and provision of more advanced traffic information. This system also aims to create a better environment for the people of Kanagawa and create a safe, smooth flowing road network. Based on the theme "For a people-and environment-friendly automobile society," a new traffic management system, the first of its kind in Japan, was introduced in Kanagawa in 19994. Furthermore, beginning in the spring of 1996, UTMS will act as an integral part of VICS.


UTMS21(Universal Traffic Management Systems)
The new traffic control system is a comprehensive traffic management system in which the conventional traffic control system is further advanced with the object of realizing a safe and comfortable automobile society by improving convenience to users of the roads.

U type information supply units

Traffic Control Center ITCS(Integrated Traffic Control Systems)

System Control

Control Room

Control of traffic signals responding to traffic condition and operation of changeable message signs are conducted in the control room based on data obtained from various detectors. Traffic enforcement commands are slso issued to the police on field.

Helicopter, Patrol car, Motorcycle

Signal Control

Signal controllers/Traffic information monitor

Traffic signals are controlled with the red, green, and yellow signal timing based on traffic condition and also for smooth running of buses.

Bus detector

Information Dissemination

Free pattern type changeable message signSemmi-free pattern type changeable massage sign
Travel time display signBroadcasting room

Information about traffic congestion, required traveling time, the current state of roads, traffic regulations and availability of spaces at principle car parks is displayed in either text or graphic formats. By radio broadcast, the telephone service and car navigation systems using VICS, it is also possible to obtain information about traffic restriction, roads works, and events.

Parking meter information signParking information signRoadside radio sign
In-vehicle infrared transceiver

Information Collection

Video image vehicle detector/ITV camera

Traffic flows at principal intersections are displayed on monitors and detailed traffic information such as speed and volume and degree of congestion are automatically detected and sent to the control center.

Ultrasonic vehicle detectorLight Beacons

Effectiveness Of Traffic Control Centers

Reduction of traffic congestion

Reduction of traffic congestion

Traffic congestion will be greatly reduced by controlling traffic signals and changeable message signs responding to the flow of traffic.

Reduction of traffic accidents

Reduction of traffic accidents

Traffic accidents due to frustrated driving will decrease by reducing the number of stops at traffic signals and by providing information on non-congested roads.

Prevention of traffic pollution

Prevention of traffic pollution

Environments friendly to the people can be realized by reducing the number of stops of vehicles due to congestion and thus reducing noise and emission of exhaust gas.

Prevention of global warming

Prevention of global warming

Reduction in vehicle fuel consumption due to smooth flow will lead to assurance of stable low commodity prices and saving of energy and thus create an environment friendly to earth.

Presentation Of Traffic Data With Navigation System

  Vehicle Information and Communication System (VICS) information can be received by current car navigation systems by adding a VICS-dedicated function. Information is transmitted via roadside light beacons that are infrared vehicle detectors capable of two-way communications. The road traffic information transmitted includes static information such as current vehicle position and route guides, and active information such as that from traffic control centers concerning traffic congestion and accidents. Using this information, it is possible to make appropriate route detours and route selections in response to traffic conditions. In this way, this system contributes to better road safety, traffic flow and the improvement in the overall driving environment.

In-vehicle unit

Headquarters' Center And City Center

Position of a Center

    • *  Large regions traffic control network
      (Metropolitan Police Department, Shizuoka prefectural Police, ect.)
    • *  VICS Center
    • *  In addition an organization Information exchange
      (NIPPON ROAD CO., Metropolitan Speedway public corporation, ect.)

  • Kanagawa Prefectural Police Headquarters
    Traffic Regulations Division