1. Excellent technology of 2,4 GHz radio communication brings new possibilities into vehicle-to-wayside communication. High-speed Radio Transmission VETRA System

2. Introduction The radio communication system is dedicated for communication between vehicles and other devices located on the route (WAYSIDE devices ). Radio communication is carried out through directive antennas on 2.4 GHz frequency. The communication is carried out in a vertical direction up or down from the vehicle. Both methods are possible, it depends on the local conditions and customer's requests. Communication system is characterized by: a high transmission speed of the signal a high resistance against disturbance.

3. Typical examples of usage for the high-speed transmission system ….. 1.Two-way transmission of the signal between a trolleybus and a switch control system; automatic setting of a switch point position and transmission of state or failure announcements. 2.Transmission of the signal from a trolleybus into traffic lights devices; preference of urban vehicles on intersections to other vehicles. 3.Two-way transmission of the signal between trolleybus and vehicle position ground devices; generates information of the actual vehicle position to the dispatching centre 4.Two-way transmission of the signal between trolleybus and vehicle position ground devices ; generates information of the expected vehicle arriving time – passenger information system 5.Transmission of the signal between „on street“ located transceiveres and a trolleybus vehicle; possible speed limit reduction 30

4. Description of the devices – how does it work Both, the vehicle part and wayside part are formed by two devices. the first one is a transceiver the second one is a processor unit. Vehicle permanently transmits a radio signal. The signal contains vehicle identification number, vehicle type, line number, course code and further information according to the client’s request. Processor 1 Transc. 1 RS485 Transc. 2 2,4 GHz Processor 2 RS485 Vehicle partWayside part

5. vehicle part device processor - terminal Terminal inside the vehicle cabin Terminal

6. One terminal keyboard is installed within each driver’s stand at convenient location. As the most commonly used function of the terminal keyboard is setting a route code. During normal operation, the display shows the currently chosen four-digit route code so that it can be easily verified by the driver at any moment. When the driver wants to change the route code, he just needs to press the SHIFT key, enter the new route code and confirm it by pressing the ENTER key. Onboard terminal keyboard KB03B Vehicle part device processor- keyboard

7. Wayside part device transceiver - antenna Antenna on the contact line Transceiver Wayside processor

8. Wayside part device processor- control unit processor control unit for switches

9. Preference of municipal transport vehicles

11. Vehicle position monitoring system Signal from vehicles is transmitted into devices of monitoring points on the route. From these points the signal is transmitted through concentrators and telecommunication cables network (or wireless network) to dispatching centre and might be used also for a Passanger Information System Because each vehicle transmits a unique identification number and course code, computer in dispatching centre is able to show actual vehicle position; this fact is compared with time table and the computer informs dispatcher about differences.

12. Passanger Information System

13. 22Parma 3´ 23Prague 5´ 22Parma 1´ 23Prague 3´ 22Prague 2´ 23Parma 10´ Passanger information system

14. Possible speed reduction 30 60

15. …….Low speed area…….. 30 60 30 60 Special function of VETRA – speed reduction

16. Switch Point Control System

17. 1. VETRA system – left direction

19. 1. VETRA system – straight direction

21. 1. VETRA system – two trolleybuses

23. www.elektroline.cz

25. Into each switch point, there is downloaded complete data sheet of the vehicle courses, list of switch points and relevant route directions. The route direction is set in accordance with switch point number adjusted in a control system and with a course code adjusted on vehicle terminal by the driver. There is also possible to use buttons for direct temporary command for required direction (left or right); this command is superior to the course code. list of switch points course codes Route directions

26. Trolley bus switch point system in Lyon

27. Hradec Králové Switch point system in Plzeň

28. Hradec Králové Switch point system in Hradec Kralove Thank You………