We present high-resolution HI data obtained using the Australia Telescope Compact Array to resolve the near/far distance ambiguities towards a sample of compact HII regions from the Red MSX Source (RMS) survey. The high-resolution data are complemented with lower resolution archival HI data extracted from the Southern and Very Large Array (VLA) Galactic Plane surveys. We resolve the distance ambiguity for nearly all of the 105 sources where the continuum was strong enough to allow analysis of the HI absorption line structure. This represents another step in the determination of distances to the total RMS sample, which with over 1000 massive young stellar objects and compact HII regions is the largest and most complete sample of its kind. The full sample will allow the distribution of massive star formation in the Galaxy to be examined.

Cone search capability for table J/MNRAS/420/1656/table3 (*Summary of measured source, tangent and absorption velocities, kinematic distances and results of our Kinematic Distance Ambiguity (KDA) analysis)

Cone search capability for table J/MNRAS/420/1656/table1 (Summary of fields observed, synthesized beam parameters and rms of the restored images)

Cone search capability for table J/MNRAS/420/1656/table2 (Radio source parameters)