I have static water bug too!
(EM 4 Standart v.)
There is only one patrol path and all my units are patroling in column.
There are a lot of jams when patroling viechle meets heavy traffic.
And when my tiller trailer starts burning (YAY) i can't extinguish it. I mean when it started to burn i moved away main truck from tiller and left trailer. You cant do anything with it.
Hope you understand ;D
Burning trailer of the tiller will be fixed. As well as SOME of the choking points. I added traffic lights to 3 intersections. Unfortunately, I can't do much about the patrolling vehicles. They ignore traffic lights and will collide with oncoming traffic.
I don't know about the static water though.

Hoppah