Is there a list of criteria that shows the driver when to enact or disable the driver-less system?
Here’s the wording right out of the Tesla manual:
Warning:
Autosteer is a hands-on feature.
You must keep your hands on the steering
wheel at all times.
Warning:
Autosteer is intended for use
only on highways and limited-access
roads with a fully attentive driver. When
using Autosteer, hold the steering wheel
and be mindful of road conditions and
surrounding
traffic.
Do not use Autosteer
on city streets, in construction zones, or
in areas where bicyclists or pedestrians
may be present. Never depend on
Autosteer to determine an appropriate
driving path. Always be prepared to take
immediate action. Failure to follow these
instructions could cause damage, serious
injury or death
https://www.tesla.com/sites/default/files/model_s_owners_manual_north_america_en_us.pdf