Two and a half years after a consortium was launched to develop the prototype of an autonomous regional train in France, SNCF and its partners Alstom, Bosch, Spirops, Thales and the Railenium Technology Research Institute are putting their test train into operation.
At the start of the year, a Regio 2N regional train was modified and equipped for the purpose of the trials by the Alstom site in Crespin (formerly Bombardier). Various sensors, cameras, radars and lidars (laser detection) were fitted to collect essential data for the project.

INITIAL TRIALS ON COMMERCIAL TRACKS, FOLLOWED BY A PHASE OF TESTS AT THE RAILWAY TEST CENTRE

The first trials took place over one week, in the beginning of March, between Aulnoye and Busigny and between Busigny and Calais (in the North of France). The Regio 2N regional train prototype ran on a commercial track, with the project's engineers and technicians on board.

The trials included tests of:

• The perception and recognition systems for the signals located along the track;
• The geolocation system, particularly by satellite, which provides the precise position of the train.

During this first phase of trials, the sensors and equipment of these new systems specially fitted on the train were activated for the purpose of observing how they work but did not interfere with the movement of the train. 
The Regio 2N regional train prototype was driven by an SNCF driver specialised in operating under test conditions. 

At the end of this week of trials, tests were conducted at the CEF railway test centre in Petite-Forêt, near Valenciennes, to test the train's autonomous operation system, which makes it possible to automate the acceleration and braking of the train.

A SECOND TRIAL PHASE UNDERWAY TO ACHIEVE SEMI-AUTONOMY

From 17 to 21 May, following the tests carried out at the CEF railway test centre, a second series of trials has been scheduled to fine-tune the operating system of the train prototype. 

These new trials are taking place on the national railway network at Busigny (in the North of France) and will lead, in the coming months, to semi-autonomous operation in the trial phase.

Semi-autonomous operation makes it possible to automate the acceleration and braking of the train, supervised by a driver.

These trials are a key step towards achieving the consortium's ultimate objective: achieving full autonomy by 2023. 

The trials, authorised by the French National Railway Safety Authority (EPSF), will help to substantiate the safety demonstration required for the train's future authorisation to operate.
As an observer in the project, EPSF will be in a position to assess the understanding of the technologies developed and their impact on the railway system, as well as any possible regulatory changes needing to be made for this new type of operation.

Cybersecurity issues, which are crucial for the autonomous train, have been taken into consideration from the start of the project. The project partners are working closely with ANSSI (Agence Nationale de la Sécurité des Systèmes d'Information), the French national cybersecurity authority. 

TRAIN PROTOTYPE TO ALTERNATE BETWEEN COMMERCIAL SERVICE AND TRIALS OVER THE NEXT TWO YEARS

This Regio 2N regional train will be used over the next two years as a prototype of the autonomous passenger train. 

The train will be tested on the track between Aulnoye and Busigny, during the school holidays.

Outside the research and test periods, the Regio 2N regional train, an activity of SNCF Voyageurs, will be in regular commercial service, transporting passengers. During these commercial trips, in conventional driving mode, it will record data that will improve the performance of the signal recognition algorithms by detecting, for example, the colour of the traffic lights and the surrounding environment of the train.
 
At the same time, laboratory work is being carried out on trial simulators at the sites of all the consortium partners to fine-tune the itineraries of the test train and further develop the automated system. 

AUTONOMOUS TRAIN: REAL BENEFITS FOR TRANSPORTING PASSENGERS AND GOODS

Train automation means real benefits for rail customers:

• Increased capacity, because running more trains means being able to transport more passengers and more goods;
• Greater fluidity and regularity thanks to harmonised traffic flow and optimised speed, making it easier to react to unforeseen circumstances;
• More environmental-friendly transport, thanks to reduced energy consumption and the shift from road to rail.

Autonomy thus provides rail transport with new perspectives: more flexible organisation, with the possibility of rapidly changing the number of trains in line with changing needs. These benefits will encourage a modal shift from road to rail, thereby contributing to a more environmental-friendly mode of transport.