Railway services


The SAET L1 project makes part of the global project of paris metro Line 1 automation, same as line 14.

SAET L1 : Automation of line 1 of the Paris metro


> DATE : 2009
> LOCATION : Line 1, Paris Metro

Project context

> The SAET L1 project is registered in the overall project for complete automation of line 1 of the Paris metro, as is the case with line 14.

A particular feature of the project is that it must take place without incurring any downtime and with a mixed operating phase (automatic and manual) on an already existing line.

The SAET L1 is a CBTC (Communication Based Train Control) controlling various automatic pilots and supervision modules. The CBTC is developed in B by Siemens Transportation Systems (identical to line 14).

Our actions

The activities performed focus on the safety aspect of the SIL4 software and are said to be a second look.

They comprise:

  • Analysis and critical rereading of the various B models, the Ada code as well as the various documents supplied (design files, specifications, safety analyses, etc),
  • Verification of the rules added within the context of the formal software proof,
  • Validation of the tests,
  • Replay of the formal proofing performed with Atelier B.