Congestion occurs when the network becomes saturated, meaning it is not possible to continue transporting or distributing the full quantities of gas injected or drawn off, due to the characteristics and performance of the equipment on the grid.
On the European scale, congestion is part of the reason why price differences persist between different marketplaces.
In France, the creation of a single market area (TRF) has allowed:
the introduction of a single price, to the benefit of all consumers,
increased liquidity in the French market, making it more competitive and better integrated into the European market,
greater security of supply in France, improving access to different sources of gas.
The new infrastructure associated with TRF has reduced the risk of congestion in the core grid.