Map of angle differences between the RW spine and pixelized stellar polarization angles. This covers the entire extent of the RW, for stars with distances <1.2 kpc. The molecular clouds annotated are: TMC, Orion A, Orion B, Cepheus, and the Polaris Flare (PF). Vertical dashed lines mark the nearest approach region within l = (122°, 188°). The inset shows the normalized PRS for the three longitude ranges indicated in the main panel (l > 188°, the nearest approach range, and l < 122°). For an explanation of the violin plots and red markers see Fig. 6.