L4 is surely not automatic (at least on INTL). As I do not want all roads locked by me to raise their locks to L4, as that would cause problems to L3 AMs, I haven't asked for L4 yet and I'm L3 still. I will ask for L4 later, when it will make more positive than negative effects.
I still hope devs will implement better locks functions, so segment lock would be adjustable to lower than editor's rank.
if it looks strange, it's my phone's fault
SK Country Coordinator, Editing & Client Expert, AM @ South-West Slovakia
Waze 220.127.116.113 on HTC One, Android 4.4.3 @ white Škoda Octavia RS Combi