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[sumo-user] How to create random trips for N vehicles per hour split between a ratio of two vehicle types?
  • From: Devon Fazekas <thomas-d@xxxxxxxxxx>
  • Date: Sun, 16 Oct 2022 16:43:07 +0000
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  • Thread-topic: How to create random trips for N vehicles per hour split between a ratio of two vehicle types?

I have two types of vehicles, A and B. The total number of vehicles must be split between both types. I'm testing if the number of SSM conflicts reduces as the penetration ratio of type B vehicles increase from 0%, 25%, 50%, and so on. I also need to repeat for increasing traffic demand (1000 veh/hr, 1500 veh/hr, 2000 veh/hr).

So, for the base case, I need to insert 1000 vehicles per hour (all as type A).

 

 

How can I create random trips of `N` vehicles per hour, where 75% of them are of vehicle type `A` and 25% of type `B`.

 

My current approach uses RandomTrips.py with the –insertion-rate` option equal to `N` and a `vTypeDistribution` containing two vehicles types leveraging the `probability` attribute with values `A` and `B`.

 

 

randomTrips.py

--net-file="grid.net.xml"

--output-trip-file="trips.trips.xml"

--trip-attributes='departPos="random" departSpeed="max" type="civilianVehicles" departLane="best"'

--min-distance=1500

--allow-fringe

--fringe-factor="10000"

--insertion-rate=100

 

 

This approach doesn’t guarantee the ratios I need as it relies on probability.

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