visualization in train evacuation (SFPE method)

[enronc]

Hi everybody,
I am currently working on evacuation simulations with PathFinder in trains.
Using the SFPE method I notice in the output videos that sometimes people overtake others "through" their body. It happens only in SFPE mode and I think it is only a problem of visualization.
Does it happen due to the small space between elements in trains? Have not these persons to wait before the passage is available?
Can someone help me to understand how to solve this problem?

I post a photo to show you it and I can send also a video of the simulation if it is needed.

http://img40.imageshack.us/img40/7339/capturetrain.png

Thank you in advance,
Enrico

[Charlie Thornton]

To accurately reproduce the SFPE flow equations, the pure SFPE mode disables collision checking.  You can enable collisions via simulation parameters, but sometimes it changes the results (most pronounced when modeling small, interconnected rooms and stairs).