Left: distribution of stellar polarization angles, θ_R for stars farther than 250 pc (solid line). The dashed vertical line shows the χ₃₅₃+90° from Planck at 80′ resolution. Right: probability density functions of the orientation of linear HI structures (θ_RHT) for different velocity ranges (shown on the right). We only consider velocity ranges within the peak of the HI intensity spectrum. The filled circles in the bottom mark the mean value, ⟨θ_RHT⟩ for each velocity range. All angles are measured in the Galactic reference frame, according to the IAU convention.