10
For X:
We have one linear formula as follow which is calculate from ISO 17387 Chapter 4
Table 3
T=0.1V +1.5 (where T is TTC and V is relative speed)
That means different relative speed, we have different TTC.
X=V*T
If VT≦Xr then X=Xr (fix)
If VT>Xr then X=VT (Dynamic)
