Except that highway traffic is usually moving too fast for an articulated vehicle, which have a natural point of instability related to speed, far more so than a solo vehicle. And this is different than braking or accident-avoidance maneuvering speeds. Going with the flow in pack of morons who've failed to maintain adequate following distances is more a recipe for disaster. Given that few A/S owners appear interested in actually setting up a WD hitch to its best, or better tires, much less install best brakes or controller, I'd hardly consider this to be wise. They wouldn't know how the rig should handle just for starters. There is a point where an A/S being a better TT is not nearly enough margin (and, as always, a pickup truck TV only makes a good thing worse).
Keep never less than a four-second following distance, preferably five seconds, is closer to good advice. One would never (I have never) seen this advice of "flow" given in driving 18-wheelers. Travel speed is an actual irrelevancy if a situation is understood correctly. Best forward progress is time management, not mph. No one can seen around curves or through hills, but the morons act as though there will never be a problem . . so why drive "with" them. Learning to manage them around ones rig is no great skill accomplishment.
J2807 has some huge flaws, some of which we have discussed in the past. It needs revision to be taken seriously as a guide for best practice.
1990 35' Silver Streak Sterling
; 9k GVWR.
2004 DODGE Cummins 305/555; 6-manual; 9k GVWR.
Hensley Arrow. 10-cpm solo, 18-cpm towing
Sold: Silver Streak Model 3411