GISKiwi

VRP - Attempting to use Order Pairs for Bus Routing

Discussion created by GISKiwi on May 17, 2011
Latest reply on May 20, 2011 by nan-esristaff
My bus routing problem has been doign my head in. The tools don't seem to quite match what I want to do exactly.

Simply I have 75 schools and 1700 students eligible for School Bus travel. Each student is pickup on the network and transported to their best match school based on age, gender Etc.

I have got a model that can create the routes for individual schools (based on selections on the student and schools layers) however I want buses to be able to transport students going to different schools. This will mean there are less routes overall and improve efficiency.

I have been attempting to use the Order Paris Network Object however when I try and solve it this error is returned (a snippit).

Warning: Order Pairs (FirstOrderName = "7204", SecondOrderName = "Coastal Taranaki School") has a SecondOrderName value for an order that is already paired.
Warning: Order Pairs (FirstOrderName = "7211", SecondOrderName = "Coastal Taranaki School") has a SecondOrderName value for an order that is already paired.
Warning: Order Pairs (FirstOrderName = "7224", SecondOrderName = "Coastal Taranaki School") has a SecondOrderName value for an order that is already paired.
Warning: Order Pairs (FirstOrderName = "7277", SecondOrderName = "Coastal Taranaki School") has a SecondOrderName value for an order that is already paired.
Warning: Order Pairs (FirstOrderName = "7464", SecondOrderName = "Rahotu School") has a SecondOrderName value for an order that is already paired.
Warning: Order Pairs (FirstOrderName = "7519", SecondOrderName = "Rahotu School") has a SecondOrderName value for an order that is already paired.
Warning: Order Pairs (FirstOrderName = "7526", SecondOrderName = "Rahotu School") has a SecondOrderName value for an order that is already paired.
Warning: Order Pairs (FirstOrderName = "7528", SecondOrderName = "Rahotu School") has a SecondOrderName value for an order that is already paired.
Warning: Order Pairs (FirstOrderName = "7786", SecondOrderName = "Matapu School") has a SecondOrderName value for an order that is already paired.
Warning: Order Pairs (FirstOrderName = "7822", SecondOrderName = "Matapu School") has a SecondOrderName value for an order that is already paired.
Warning: Order Pairs (FirstOrderName = "7850", SecondOrderName = "Auroa School") has a SecondOrderName value for an order that is already paired.
Warning: Order Pairs (FirstOrderName = "7851", SecondOrderName = "Auroa School") has a SecondOrderName value for an order that is already paired.
Warning: Order Pairs (FirstOrderName = "7861", SecondOrderName = "Auroa School") has a SecondOrderName value for an order that is already paired.

It appears to me that you cannot have the same second order pair for different first order pairs. This is clearly a problem when I am trying to route multiple students to the same schools. Does every Order Pairing need to be unique?

Any ideas? Am I even on the right path?

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