Re: [sumo-user] How lcCooperative and lcCooperativeSpeed affect speed

[Jakob Erdmann <namdre.sumo@xxxxxxxxx>]

For any given lane change situation where one vehicle blocks another, either of the two vehicles may reduce it's speed to change their relative position. The lanechange model tries to calculate an ideal speed adjustment and with lcCooperativeSpeed=1 this speed is then used. With lower values of lcCooperativeSpeed, the speed adjustment is followed less stringently.

The value of lcCooperative mainly controls the willingness for cooperative lane changing (rather than speed adjustment) but for historical reasons, it also sets the default for lcCooperativeSpeed if that attribute is not defined explicitly.

For code, see https://github.com/eclipse/sumo/blob/502cbdd196d2a1ab2bad51d3977b7e4958d2c902/src/microsim/lcmodels/MSLCM_LC2013.cpp#L264-L276

Am Fr., 15. Jan. 2021 um 18:57 Uhr schrieb Bae, Jong In <jbae42@xxxxxxxxxx>:

Hello,

Based on the description on SUMO website and my experiments, lcCooperative and lcCooperativeSpeed reduce the speed of the vehicle when there is another vehicle trying to merge.

How do these two parameters change the speed calculation?

Any explanation or source code would be greatly appreciated!

Thank you!

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