It was on a busy section of the 23 freeway at around 4:45pm local time in Moorpark. This is a regular rat run from CMA to VNY.
It was not yet sunset and it was pretty risky (or rather stupid) of the instructor to land on a busy freeway when there is a golf course etc just a short distance away which would likely have been much safer at that time.
Had a member of the public driving on that freeway been injured, the outcome could have been pretty bad. Never put somebody on the ground in jeopardy.