KnowraRéseau express régionalLinked fromLinked fromThe 4 pages that link to Réseau express régional, each with the reason it gives.All 4Broader topic 1Compared with 3Paris MetroCompared with: The RER complements the Metro by linking Paris to distant suburbs and major destinations.Lyon MetroCompared with: It provides a contrast between Lyon’s urban metro and a region-wide suburban rail system.S-BahnCompared with: Paris’s RER fills a role comparable to S-Bahn while following a distinct network and operating tradition.