Thing is, this kind of thing can block escape routes and now you have a cluster. Lightning, power lines, and high profile vehicles are perhaps a more immediate danger than the tornado itself.
And then, there is this;
Nebraska train conductor Eric Carlisle captured intense footage of an EF-3 tornado as it approached and hit the train he was working on.
laughingsquid.com
The vortex core as we see it looks of very little threat to that heavy locomotive engine itself outside of the glass---but the broad surrounding circulation almost certainly laid over (empty?) boxcars to either side.
Truckers are not chasers---if anything the loss of CB culture from the late 1970's means they are probably LESS weather aware, even with all the smartphones.
If a trucker has a weatherbug--it is likely for his home town. I think most of these are long haul guys trying to make a deadline.
Let me give you an example of what goes one behind the scenes--
The safety man squawks at them and plays a soulless corporate video...
and after the BS is done---their dispatcher tells them they want the load over there by tomorrow morning.
You listen to who pays you.
If DISPATCHERS paid traffic tickets rather than truckers (who are known to carry large sums of cash to pay highwaymen who pull them over at the end of the month to make quota)--I suspect incidents would drop by half.
Recent video
The one on the left may be a different vantage point of the train video---the debris looks similar.
Look at the trucks stopped in all the lanes....they need to stay their butts on the right hand lane where folks can get around them...they build steel walls that block traffic.