table is initialized using module 2.22.
Using a command escape, the AWK script transfer.awk (which constitutes an integral part of the macros) is activated. It parses the files generated in steps 1 and 2 and generates a base network modification file.
This base network modification file is processed using module 2.11.
Using a command escape, the AWK script transfer.awk is again activated. This time it removes the ``path=no'' clauses from the transit line file generated in step 3, so that the line itineraries will now automatically be routed through the new node sequence 
- 
.
The transit line file resulting from the previous step is read into the data bank using module 2.21.
The attributes of the newly added transit segments connecting nodes - are set to the proper values using the network calculator module 2.41.
Note that since the macro will increase the network size, it is up to the user to make sure that enough space is still available in the scenario to hold the new network elements. Assuming that at node T, there are L incoming line segments and A adjacent links (incoming or outgoing), then the network transformation will require at most L+1 additional nodes, A+L+1 additional links and L(L+1) additional line segments.
Once the macro has terminated the scenario a transit assignment can be performed normally and all the display and analysis tools can be used as usual.
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