Hi Jakob,
thank you very much. Can you tell me, how/with which formula the
x-y-position of each vehicle is computed (let's consider a cross
intersection where straight roads from north, west, south, east meet in
the middle)? For straight movement either x or y is incremented by the
velocity times timestep and the other variable stays the same, but how
is it actually done when the vehicle turns? Here both x and y changes.
Best regards,
Duc
On 18.09.2017 21:29, Jakob Erdmann wrote:
Hello,
by default, vehicles drive on so-called "internal edges" while passing
an intersection. They follow the car follow model just as on normal
edges/lanes. You can see these edges when you disable the option "draw
junction shape" in the gui visualisation settings. Only if you have
built your network with the option --no-internal-links will vehicles
"jump" over intersections.
regards,
Jakob
2017-09-18 13:40 GMT+02:00 Do Duc Le via sumo-user
<[email protected]
<mailto:[email protected]>>:
Hi,
as the title says I'm interested in how the position of the
vehicles are computed when turning at an intersection/junction. I
know SUMO follows the car following model of Krauß and the
position is computed as x(t + d t) = x(t) + v(t + d t)d for
straight movement , which I also confirmed by the Traci function
"traci.vehicle.getDistance( )". But I can't find any information
on how the position or distance of each vehicle is computed when
it turns left/right into another lane/edge (consider a simple
cross intersection). It seems like the vehicle disappears from the
network when it reaches the junction (at least it is not on any
edge) and reappears if it leaves the junction again.
Does any of you know how those functions are computed?
Best regards,
Duc
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