RER B

RER B is a major rail line in the Parisian suburban train network that connects the city center to the airports and northern suburbs. It facilitates quick, efficient transportation for commuters and travelers, running from central Paris to areas like Charles de Gaulle Airport and Mitry-Claye. The line is part of the RER (Réseau Express Régional), a regional train system that helps people move easily across greater Paris, reducing congestion and providing a fast link between the city and its outskirts. RER B is essential for daily commuting and airport access in the Paris region.