You can specify the direction of movement allowed for a link in a network topology. AutoCAD Map 3D uses this direction when tracing through network topology for path traces, best route analysis, and flood traces.
|Direction||Property in the Properties palette||Object data value|
|Same as created. Movement along the link is allowed only in the direction that the link was created.||Forward||1|
|Reverse of created direction. Movement along the link is allowed only in the opposite direction that the link was created.||Reverse||-1|
The default direction of an arc, or a two-point polyline with an arc segment, is counterclockwise. Set the value to Bi-Directional (0) or Forward (1) for counterclockwise, and to Reverse (-1) for clockwise.