I have a small city of around 5,000 people that uses 3 coal powerplants to run. My coal trucks don't seem to be turning up as often as I need them too,which is causing brownouts in my city,and when they do turn-up they get stuck behind traffic,as my city in very heavily import-focused. Would there be any way I could design a road specially for the coal-trucks and have them use it and it alone,and get them to turn up at regular intervals,as this is quite literally killing my city? I could try a Oil powerplant,but then I'd have the same issue.