operators passing one another on network node

hello,
i am trying to create an evacuation model and have a question about how the people will move. currently i have people modeled as operators that will travel along network nodes. each person has their own speed as well as their own network node they'll initially travel down. all the nodes eventually meet up at one that will lead them out of the building. since the operators are each moving at different speeds, some will obviously be moving at a slower pace than others. i'd like the faster people to be able to pass the slower ones without visually just walking right through them. is there a way i can get them to simply pass on the side of others? or is there some logic that i can put on a node to look at the speed of an operator on the node ahead of it, then determine if it wants to jump to another travel network? this is my first time working with network nodes so i'm not entirely sure how they work, and would appreciate any help.

thank you,
danielle

Have a look at the "turn to the left" code snippet generated for collision spheres, where one task executer passes the other. IMHO it may be a good starting point:

treenode thisobject=ownerobject(c);
treenode otherobject=parnode(1);
treenode thissphere=parnode(2);
treenode othersphere=parnode(3);
{ //************* PickOption Start *************\\
/**Turn to the left.*/
/**\n\n*/
double prevcollision = getvarnum(thisobject,"incollision");
doublearray turn = makearray(3);
turn[0] = vectorprojectx(thisobject,3,3,0,model());
turn[1] = vectorprojecty(thisobject,3,3,0,model());
turn[2] = vectorprojectz(thisobject,3,3,0,model());
int preempttype = 0;
if (prevcollision == 0)
  preempttype = PREEMPT_ONLY;
else
  return 0;
setpreempt(gettasksequence(thisobject, 0), 0); // This line is required to preempt a preempting task
createtraveltoloctask(thisobject,0,turn[0],turn[1],turn[2],0,0,preempttype);
return 0;
} //******* PickOption End *******\\