Senate committee substitute makes the following changes to the 1st edition. 

Amends proposed GS 20-152(c) to provide that the other provisions of the statute, concerning following too closely, do not apply to the driver of any nonleading commercial motor vehicle traveling in a platoon on any roadway where the Department of Transportation has authorized travel by platoon through a traffic ordinance (was, traveling in a platoon with other commercial motor vehicles). Makes conforming changes to the act's long title.

Adds a new section requiring the Department of Transportation to report on the implementation of the act to the Joint Legislative Transportation Oversight Committee by April 1, 2018. Makes conforming technical changes.