As you can see in my screenshots, my alloy trucks tasked with delivering material to the arcology build site never return. It's been like this for days, with all of the them in the same spot, not moving at all. Bad thing is, since my shipment vehicles are stuck there, they can't deliver anything, meaning my entire trade system (which is the focus of my city) is at a standstill with only a few working vehicles. It's really hurting my budget (notice the ~$14.8k/hr deficit)
I've tried deleting vehicle garages at my trade depots and rebuilding them, but this doesn't seem to fix the problem. I have also tried logging off then back in with no avail.