AB 208, Bigelow. Vehicles: highway: lane use.

Existing law (2015) requires, on a 2-lane highway where passing is
unsafe due to specified reasons, *a slow-moving vehicle* behind
which 5 or more vehicles are formed in a line to turn off the roadway
at the nearest place designed as a turnout or wherever sufficient
area of a safe turnout exists in order to permit the vehicles
following it to proceed.

This bill (2016) requires, on a 2-lane highway where passing is
unsafe due to specified reasons, *any vehicle* proceeding upon
the highway at a speed less than the *normal speed of traffic*
moving in the same direction at that time, behind which 5 or more
vehicles are formed in line, to turn off the roadway at the
nearest place designated as a turnout or wherever sufficient area
for a safe turnout exists.

"slow moving" vs "any vehicle at less than normal speed"
https://leginfo.legislature.ca.gov/f...201520160AB208