What you're describing is more like Level 4 which is basically Level 5 with a bit of hedge for weather and/or other specific environments.

"Level 3: Within known, limited environments (such as freeways), the driver can safely turn their attention away from driving tasks, but must still be prepared to take control when needed."

L3 on the other hand may be a good and useful system to, say, automate freeway driving but it's basically useless as a system for replacing taxis.