It seems the traffic jams are all down to tailgaters and impatient drivers and the fix is to leave a big gap ahead of you.
Another phenomena I have found is when travelling, as I often do between Brisbane and Bundaberg (375 klms, usually a 4 hour drive), if I drive say 10 kmh over the speed limit and pass other vehicles as much as possible, after slowing for towns and roadworks, the time gain is very little or nil compared to if I had just stayed in the traffic flow and to the speed limit.
The risk factor is much greater for little or no gain.
The latest RACQ Road Ahead magazine has an article "Battling the Big Waves" (traffic waves) which references this web page and the last line of the article is
"Leave space, don't cramp your style and become a Zen Traffic Warrior."
trafficwaves.org/