Obviously -- unlike the UNDIRECTED TRAFGRAFS -- these must be CONNECTED to "CARRY" DIRECTIONS. (Colored paper arrow-heads on rods will suffice as "directors".)

	2	*------>------*		*-----<-----*



        3       *---->----*             *-----<-*
                 ^        |              \      |      
                  \       |               \     |
                   \      |                \    ^
                    \     V                 \   |
                     \    |                  \  |
                      \   |                   \ |
                       \  |                    V|
                        \ |                     *
                          *                      


         4      *----->-----*           *----<-----*            *->-----*
                |           |           |          |            |\     /|
                |           |           |          |            | \   / |  
                ^           |           V          |            ^  \ /  |
                |           V           |          ^            |   /   |
                |           |           |          |            |  / \  V 
                |           |           |          |            | V   V |
                *-----<-----*           *----->----*            *---<---*