The Number of Nodes in Solution field sets the maximum number of decision nodes passed into the Integer Solver. This field affects the analysis as follows:

• The system runs a linear programming solution (LPS) iteratively. It uses this type of solution because it is fast.
• For road sections in the LPS result whose "portion to include [treat]" into the optimal result is close to 0 or 1, the system rejects or includes these sections entirely in the solution.
• The system repeats steps 1 and 2 on the reduced set of sections until there are only N nodes (sections) left in the undetermined state (that is neither accepted [treated] or rejected [not treated]).
• For these remaining nodes (sections), run the integer program (where the 0/1 solutions from LPS are hard-wired as inputs into the integer program).