question

When using a travel network you could use triggers on the network nodes to set the maximum speed of the task executer depending on what direction it came from/where it is going.

In the OnArrival trigger you can access the "toedge" and "fromedge" variable which relate to the rank of the respective path the transporter came from or is travelling to.

set_speed_on_NN.fsm

If you want to pursue your idea further:

"Object.location" and "Object.getLocation()" are the commands to determine the position of an object in the model. In your screenshot, you are trying to get the location of the transporter library object (which doesn't have one as it's not an actual object in the model). Use

Model.find("<Name of the transporter>")

to reference to the actual task executer.

To know what object the transporter is travelling to next, you can use this code

Object GoalObject = nullvar;
treenode TS = getvarnode(Model.find("Transporter2"), "activetasksequence");

if(TS.subnodes.length > 0)
{
    // There is an active task sequence
    TaskSequence.Task CurTask;
    for(int index = 1; index <= TS.subnodes[1].subnodes.length; index++)  
    {
        CurTask = TS.subnodes[1].subnodes[index];
        if(CurTask.state > 2 || CurTask.type != TASKTYPE_TRAVEL)
        {
            // Task is already finished or not a travel task
            continue;
        }
        GoalObject = CurTask.involved1;
        break;
    }
}

This will assign the object that the task executer is travelling to next (if there is one) to the variable "GoalObject".