You can see the Video Explaining the idea here http://youtu.be/YgzuX8juTW4

Text Transcript :

We can make the Turn Restriction tool more automated, by the order that we select the ways that will make out the Turn Restriction.

The first time we select the From The second time we select the Via The Third time we select the To

If you look now, the order is ok But you still need to type the 3 roles, losing ~10 seconds for each TR. My suggestion is to make the Turn Restriction autocomplete the FROM,VIA,TO fields if it detect a logical path between them

If you don`t wanna code that much: Put a experiential feature that allow the autocomplete function to exist, only on the logic :

What was selected first becomes “From”, second becomes “Via”, third becomes “To”. Without a logical check in place. Expert Users will still benefit from this function.

Steps involved in the actual process :

• Move mouse to the “from” Box -Click on the “from” Box

• Type at least 2 words, so you will get the “from” suggestion, and not “forward”

• Move mouse to the “via” Box -Click on the “via” Box

• Type at least the “v” so you will get the autocomplete suggestion for the “via”

• Move mouse to the “to” Box -Click on the “to” Box

• Type at least the “t” so you will get the autocomplete suggestion for the “to”

• Move mouse to the ok button
• Click the ok button

A special thanks to all JOSM developers that are making this great tool even greater.