Changing Attribute Parameters in Streetmaps

Discussion created by rosenbat on Apr 1, 2011
I am trying to use the streetmaps network to estimate an OD problem.  I am trying to change the time parameters, but when I go to the attribute menu of the layer's menu there seems to be no way to do this.  I also tried doing this via a python script, but this did not work there either.
Two questions:
1. Is it possible to change the parameters for the streetmaps network.
2. If not -- is there a work around such that I can do routing with a different speed than that in the defaults.
Thanks for the help.