Depending upon the terrain, how a particular car leaves the tracks and several other factors you could have one parked in the first floor. Probably not real likely but it is possible.

The big problem is a chem spill. Even worse is gaseous. Regardless your dorm and truck could easily be in the contamination zone. You need to base your plans upon the fact you might not be able to get there. Even an accident without any contamination might be cordoned off by the atthorities for an indefinate amout of time. You might have to detour much farther than you think.

Plan for an alternate location on your side of the tracks. Or possibly a cashe of supplies.

For EDC figure it should be pretty much a standard affair. Maybe toss a few snacks and drinks plus somethink to pass time.