Age-velocity dispersion for the RGB stars (left) and for the turn-off stars (right) closer than 1 kpc from the Sun. A clear trend is found in both samples, for each velocity component. However, the fact that these trends do not exhibit the same shape, highlights the different precisions achieved for each stellar type: RGB stars tend to have underestimated ages for old stars, whereas the younger turn-off stars tend to have overestimated ages.