Together with a new link, all possible turns are inserted at the From-node and the To-node of the link (Creating a link). You can thus not insert turns manually, but edit them only. Main turns are edited in the junction editor (Editing turns in the Junction editor).
The newly created turns have preset attribute values that you can specify in the turn standards (Managing turn standards). By default, they are open to all transport systems which are permitted both on the From-link and on the To-link (Fundamentals: Turns).
You can specify that new turns of the type U-turn are closed by default.
1. From the Edit menu, choose User preferences.
The User preferences window opens.
2. In the navigator, select the entry Network > Turns and main turns.
3. Select the Open any turns other than U-turns option.
For newly created turns, the U-turns are closed.
