A curved piece after the diverging route of a turnout that cancels the turnout angle. The branch then runs parallel to the main track, at the track spacing.
On Märklin C track 24224 (R2, 24.3°) is the compensating curve for turnout 24611; on K track it is 2232 (22.5°) after 2262.
Märklin C track: articles, geometry and the track planner