TESTS OF PT PREFERENCE USING V2X AND IBIS-IP IN LUDWIGSBURG

TESTS OF PT PREFERENCE USING V2X AND IBIS-IP IN LUDWIGSBURG

German cities and Czech cities face similar problems i.e. they try to prefer public transportation and they want to use standards defined in the whole EU to do that – in this case it is communication between a PT vehicle and an intersection control unit. On 14.4.2021, we tested  public transportation preference  using the V2X communication standard in Ludwigsburg (Baden-Württemberg). We have been working with this standard for a long time (see our installations of  PT preference using V2X in 720 PT vehicles and at 81 intersections  in the city of Brno). Our  UCU 5.0 LWVG  OBU (On-Board-Unit) was installed in a MAN bus belonging to  the  LVL-Jäger company in Ludwigsburg (see the below picture).

MAN bus belonging to LVL-Jäger equipped with a V2X – UCU 5.0 LWVG unit with PT preference on Swarco control units.

MAN bus belonging to LVL-Jäger equipped with a V2X – UCU 5.0 LWVG unit with PT preference on Swarco control units.

The UCU 5.0 unit  was connected to an on-board computer made by the IVU Traffic company (German manufacturer based in Berlin). Communication with the computer was facilitated by using the IBIS-IP standard i.e. a standard that is newly integrated in UCU 5.0. When started, the unit connected to the IVU Traffic computer and requested information produced by the on-board computer. The unit got information about the route, the destination, the current stop, delay and opening of its doors on a regular basis. This information was reflected in messages sent via V2X. As the installation procedure of our OBU unit (UCU 5.0) is simple, it was performed by the employees of the  LVL-Jäger company as per the manual that we provided.

 Installed UCU 5.0 in a MAN bus in Ludwigsburg.

Installed UCU 5.0 in a MAN bus in Ludwigsburg.

The actual vehicle preference was executed based on the knowledge of the route and the destination and the knowledge of the login points. The UCU unit filtered the login points and only chose login points relevant to the given route and destination. When the vehicle entered the geographic position of a login point, the OBU unit (UCU 5.0) started broadcasting a CAM message containing preference data in the R09.16 format (another standard integrated in the UCU unit). The CAM message contained a “Meldepunkt” number (login point number) and information about the route and the destination obtained from  IBIS-IP.

The trial run of the test bus with V2X communication.

The trial run of the test bus with V2X communication.

So far the test has only been performed with the receiver unit because the RSU of the intersection controller from the Swarco company have not been able to transfer R09 information to the intersection controller. This should change in the near future. All the V2X messages broadcasted by the UCU 5.0 unit underwent a thorough analysis and were compared to standards. The test was also evaluated by representatives of other cities and the evaluation was very positive.

Our UCU 5.0 units  have proven again that they meet international standards and that they can be adapted to various operation conditions.  This successful test have cleared the way for us to supply 100 pieces of these units to LVL-Jäger.  We can say that the OBU unit is tested and prepared to meet the needs of German public transportation including the used standards.

To conclude – although the test was successful on the demanding German market and the PT preference condition was met, we can say that the German standards do not allow for what is described in our  article about controlled stationing  (functional on controllers Cross in Zlin, Jihlava and Ostrava with radio staitons TAIT  and  EPIS 4.0x on-board computers) or what we supplied for intersection communication control  in the RIS II project  (with the exception of manual direction setting at intersections via an on-board computer and signal plan changes).

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