A turnout with a smaller angle and a larger diverging radius. Trains run through more smoothly and faster, but the turnout is longer.
Märklin C track 24711 has a 236.1 mm straight length and diverges 12.1° on R9 1114.6 mm; Roco Line 42488 diverges 10° on a 1946 mm radius.
Märklin C track: articles, geometry and the track planner