Maybe they should give the trucks a "turbo boost" button that lets them increase speed by something like 5 KM/hr for 120s every 30 minutes. Just enough to allow truck drivers to pass now and then without causing these types of log-jams on the highways, without causing safety problems. I'm sure there's a more correct combination of speeds and times than this.
Sort of like the silly "boost buttons" on the Honda CR-Z [1] or the Elantra N [2], but just lifting the speed limiter for a bit...
[1] https://en.wikipedia.org/wiki/Honda_CR-Z#Powertrain
[2] https://en.wikipedia.org/wiki/Hyundai_Elantra#Elantra_N/Avan...