Technical details

SEA, also known as the Paris-Bordeaux High-Speed Line, is Europe’s largest railway construction project and incorporates a dual standardized signaling system for safety and supervision that enables all rail operators to run their trains along this high-speed line. Opened in July 2017, the line reduced journey time from Paris to Bordeaux by more than an hour.

Built in just six years, SEA includes 187 miles of new track and infrastructure designed to comply with the most stringent European standards for railway interoperability. This is the longest stretch of track ever built at once and in such a short time. By using an original contract system, SYSTRA and the concessionaire/contractor resolved the challenges caused by the tight schedule and the scale of the project, which worked so well that the project was completed ahead of schedule. SYSTRA was involved in most of the design and build groups.