Hello,

I've been working on using random seed and had some questions. I'm having 
trouble seeing the difference between before and after I assigned a random seed 
value.
I attached a screenshot of my sumocfg file just in case my syntax is incorrect.

  1.  How is sigma different than speedDev?
  2.  According to this link 
(https://sumo.dlr.de/docs/Simulation/Randomness.html#random_number_generation_rng),
 I should be seeing randomness in loading vehicles.
To my understanding, I should expect to see randomness in the following two 
areas: (1) the entry time when vehicles enter the scenario should be different 
and (2) the sequence in vehicle type in vTypeDistribution should be different.

However, I am not seeing any difference in the vehicles' entry time or the 
sequence in vehicle type in vTypeDistribution. But I am seeing randomness in 
speed (tested with only one vehicle also). So I think the random seed is in 
effect. I'm just not sure why I am not seeing randomness in the two areas 
mentioned above.

Thank you so much for the help!

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