GM help on a Shadowrun train adventure Options

[Murrdox]

Hey chummers, here's the layout:

My Runners are going to be in the employ of a large corporation dealing with incredibly tightly controlled industrial chemicals. I also want them to do some traveling, and I want an excuse to get them out of Seattle and get them to Detroit, where I have another plot run for them. Instead of telling them to simply hop on a jet to Detroit, I came up with a better idea... escort a chemical shipment to Detroit... by TRAIN.

This would ideally be a run that could be completed relatively short, and one that doesn't necessarily involve a lot of firepower. I'm thinking more of a train mystery. A competing corporation is trying to hijack the train and steal the chemicals. I don't want it to be as obvious as "Helicopter shows up, drops off rival Shadowrunners who try to hack into the engine". I could use some additional ideas. Here's some of the things I've been thinking:

* This is a shipping train, and generally a shipping train isn't going to have many "passengers" on it for the Runners to interact with. I'm trying to think of ways around this. Part of the adventure should deal with NPCs on the train. One definite fun part of the adventure would be if a passenger or crew member was actually a "mole" assisting in the hijack, who the Runners could expose.

* During a stop, have the Runners encounter the dead body of one of the crew or a railway worker at the stop. This would lead to them knowing that something is fishy, and give them an additional mystery to solve... why was this guy killed, and by whom? (I don't know the answer to either of these questions but it's a fun idea!)

* Have an Agent that has been installed as a virus in advance onto one of the train car's nodes. The Agent is programmed to de-couple some of the train cars at a precise time, likely right after the train has passed a portion of track where a drone could come and steal the cargo from the cars, or hijack the cars themselves and take them to another track.

Any ideas on what sort of things I can do to spice this up? I also want to do something to emphasize that this is train travel in the 2070s, and not the 1970s.

Thanks in advance!