Restriction for one direction on a bi-directional segment

Discussion created by robertlindquist on Jul 19, 2011
Latest reply on Jul 19, 2011 by robertlindquist
I'm working on an application to route oversize vehicles.  I've built the network dataset from the Navteq data and have applied a number of restrictions to route oversize vehicles.  One remaining issue has to do with mast arm features which affect travel in only one direction on a bi-directional road.  Mast arms typically extend over only part of a road:  i.e. an overheight truck would not be able to pass going northbound, but southbound is OK because the mast arm only extends over the northbound side of the road.  Applying a network height parameter on that segment causes the route solver to avoid that segment regardless of direction of travel.  I would like to be able to allow southbound travel, but not northbound.  The feature class represents the road as a single line feature, its "DIR_TRAVEL" attribute is coded as "B" to allow travel in both directions.  Am I missing some Netowrk Analyst capability that can help with this issue?