114 
DFD 1.1.4: Functionality “Plan track" 
t Consider \ 
data, traffic (*w«waiori w / traffic diversion | *lo<Toafion, traffic diversion w 
* \ measures j " -- --- ^ 
1.1.4.1.2 / 
local geo. data 
mterma&on on obstacles 
> 
DFD 1.1.4.1: Functionality “Determine local circumstances’