The expected angular separation of the dead zone inner edge for 218 Herbig disks. The stellar parameters (luminosity and distance) are taken from Vioque et al. (2018). The vertical solid lines show the angular resolutions of ALMA and ngVLA obtained in our synthetic images; 10, 15, 1.5, 3.6, and 4.7 mas for ALMA Band 7, ALMA Band 6, ngVLA Band 6, ngVLA Band 5, and ngVLA Band 4, respectively. The horizontal dotted line represents the luminosity of the star in our model.