ACTROS VTC 3000 Traffic Controller
The lab owns two ACTROS road traffic controllers equipped with inductive loop detectors. The controllers are the product of Swarco Traffic Hungaria Ltd. This controller can be programmed in JAVA program language and is able to handle the complete language functionality. OCIT communication protocoll is supported by ACTROS. The controller is also used in BSc/MSc courses.
Siemens C840XS Traffic Controller
The smallest model of SITRAFFIC family with pedestrian signals, 4 signal goups, and 6 detectors.
- Standard: DIN VDE 0832 (prEN50278), RiLSA, EMC and Low-Voltage Directive.
- Processor: 32 bit Motorola 68340 CPU, Memory: 2 MB protected SRAM; Flash SIMS. Minimal memory: 5.5 MB. - Serial port (for DCF or GPS moduls).
- Central communication: BEFA12/15/16, CANTO, or OCIT.
- Signal checking: 2 channel fail-safe system.
Traffic Lights Controlled by PLCs
The Laboratory has Siemens PLCs (S7-1200 and LOGO! 12/24 RC models). A small traffic control system was built based on the PLCs containing 3 LED signal heads and button for pedestrian crossing. Each PLC is responsible for the control of one signal head, furthermore the equipment S7-1200 receives the pedestrian requests for a green sign. The PLC 1200 checks the operation of the two LOGO!s. The described devices simulate a fixed time signal program with a green request opportunity for pedestrians.
The first figure shows an overview of the system. In the second figure the wire network can be seen. The last pictures present the signal heads and the LOGO! PLCs.
Variable Message Sign (VMS)
The Lab has 2 Swarco Futurit Variable Message Signs in two sizes (96x64 and 64x64 pixels). Each pixel is realized with three RGB LEDs (red, green, blue), i.e. capable to show 64 colors. Arbitrary traffic signs (text, pictures) can be put on these screens.
A maintenance software is also available to draw new signs, and manage the existing ones. Special communication protocol of the signs can also be used for dynamic control of the screens.
The first picture shows the VMSs, the second one represents a display in operation. Third photo shows a screenshot of the maintenace software. The last one presents the RGB LEDs.