banshee1917 Do you have a scripterror with a time stamp from exactly when the crash happens, or a real-time minute or two before? I don't care about the ones that generate when you first load the save—they're probably correction logs and/or notes about a routing error that only happened because a sim was en route somewhere when you reloaded.
If you do find such a scripterror, open it with Notepad (not a browser), copy the text, and paste it into a reply here. I'm not sure I'll know what the problem is, but I can at least look.
If you don't find a scripterror from that time, add NRaas DebugEnabler, and 5-10 sim-minutes before the crash is going to happen, click City Hall and select NRaas > DE > Options: City Hall > Dump Alarms. This will create another scripterror listing all the "alarms" that trigger going forward, which is helpful for trying to figure out what's happening that's causing the crash.
Take this scripterror (the one from Dump Alarms) to the NRaas site and ask someone to look at it. You can create a new thread, then drag and drop the file itself into the window where you're writing your post. I could in theory look at this too, but in practice, I'm probably not going to know what I'm looking at, at least to the extent that I can figure out what's broken.