[sumo-user] "Lazy" boarding behavior at stops: persons jump over lanes

[joerg <schweizer.joerg@xxxxxxxxx>]

Dear all,

I observed some unexpected behavior at stops:

1. persons can enter or leave vehicles at stops, even though the vehicle 
is not at the lane where the stop is attached to, but also on lanes with 
a higher lane index (means they jump from the platform across lanes into 
the vehicle).

2. I noticed that persons  jump into vehicles even before they reached 
their edge-position according to the plan. The only condition to board  
seems to be that a vehicles stops in the defined position-range and a 
person just happens to be in this range when the vehicle stops. This 
seems to occur in more recent SUMO versions.

Unfortunately with such a behavior I cannot selectively pick up persons 
with vehicles at dedicated positions, or just park vehicles at certain 
positions.

I've been complaining about this behavior some time ago. I found a 
workaround, but especially the second behavior makes it impossible to do 
what I intend. For my purpose access lists do not help, and changing 
vehicle capacity dynamically through TraCi is not possible.

So maybe someone of you did find a way to handle this type of problem. 
Otherwise I'd ask if it were a big issue to change code, there may be 
some really simple ways of fixing:

- board only if vehicle is on the lane of the stop

- allow change vehicle capacity through TraCi (one could  lock the 
vehicle by setting capacity to 0 or to the number of persons already in 
the vehicle, but that would not prevent persons jumping off the vehicle 
whenever it stops)

- adding a Lock attribute to the vehicle, this would be the best 
solution and also closest to reality.

Thanks as always for any ideas on this matter.

Best wishes,

Joerg