Transition masses (M_HB and M_3DBondi) as functions of the radial distance around the dust traps. In panel a, δα = 0.2 when the accumulation of solids occurs due to a traffic jam. Panels b and c show the cases in which pressure maxima are developed when δα = 0.15 and δα = 0. 05, respectively. The horizontal line displays the minimum mass of the inserted embryo in our simulations (10⁻⁴M_⊕).