Economizing OD Cost Matrix when A->B = B->A

Discussion created by morangm on Apr 16, 2012
Latest reply on Apr 20, 2012 by morangm

I'm creating OD cost matrices of walking distance between transit stops in Chicago.  So, because my origins and destinations are the same files and because pedestrians don't care about one-way restrictions, the distance from Stop A to Stop B is always equal to the distance from Stop B to Stop A.

Is there a way to cut down the analysis time and output file size by having Network Analyst calculate the distance between A and B only once, instead of twice (A->B and B->A)?


PS. I have already cut down the run time and output file size by using cutoff distances.  Still, when your cutoff distance is 2 miles, it still takes forever and results in a very large output file.