Re: [sumo-user] Heavy vehicles

[François Vaudrin <francois.vaudrin.1@xxxxxxxxx>]

Super Jakob, 

Exactly what I need. 

Vielen dank,

François

Université Laval, CANADA
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De : sumo-user-bounces@xxxxxxxxxxx [sumo-user-bounces@xxxxxxxxxxx] de la part de Jakob Erdmann [namdre.sumo@xxxxxxxxx]
Envoyé : 17 avril 2020 16:38
À : Sumo project User discussions
Objet : Re: [sumo-user] Heavy vehicles

[Externe UL*]
Hello François,
The default Krauss  model can handle this.
If you configure your truck with
decel="4.5" (or the same as all the other cars)
minGap="0"
tau="5.76" (10km/h = 2.778m/s,  2.778m/s * 5.76s = 16m)
then you will get exactly 16m of extra gap for every 10km/h when following a leader car with the same speed.

In the latest development version you can easily test these numbers by calling traci.vehicle.getSecureGap
The slow-to-start behavior can simply be calibrated by setting a lower accel value.

regards,
Jakob



Am Fr., 17. Apr. 2020 um 21:39 Uhr schrieb François Vaudrin <francois.vaudrin.1@xxxxxxxxx<mailto:francois.vaudrin.1@xxxxxxxxx>>:
Halo Jakob,

Thanks for the explanation, it makes sense.

However, I wonder when the vehicle is traveling at constant speed. A heavy vehicle trucker explained to me that for every 10 km / h, he must keep the equivalent of a truck's length with the vehicle in front. For example, if a 16 m long truck is traveling at 30 km / h, it should not approach within 48 m of the vehicle in front.

Can the model take this into account?

If not, do you see a way that we could add this rule?

Vielen dank,

François

François Vaudrin, ing, MBA
Laboratoire ERICAE
Faculté des Sciences et de Génie
Université Laval, CANADA
________________________________________
De : sumo-user-bounces@xxxxxxxxxxx<mailto:sumo-user-bounces@xxxxxxxxxxx> [sumo-user-bounces@xxxxxxxxxxx<mailto:sumo-user-bounces@xxxxxxxxxxx>] de la part de Jakob Erdmann [namdre.sumo@xxxxxxxxx<mailto:namdre.sumo@xxxxxxxxx>]
Envoyé : 16 avril 2020 00:59
À : Sumo project User discussions
Objet : Re: [sumo-user] Heavy vehicles

[Externe UL*]
Hello François,
You can take this into account by setting lower values for 'accel' and 'decel' in the vType.
Lower deceleration will automatically lead to larger following distances when using the default carFollowModel.
Lowe acceleration will make them slower to start.
Note, that the default values for vClass truck are accel 1.3 (default for cars is 2.6) and decel 4 (default is 4.5).
regards,
Jakob

Am Do., 16. Apr. 2020 um 01:19 Uhr schrieb François Vaudrin <francois.vaudrin.1@xxxxxxxxx<mailto:francois.vaudrin.1@xxxxxxxxx><mailto:francois.vaudrin.1@xxxxxxxxx<mailto:francois.vaudrin.1@xxxxxxxxx>>>:
Halo all,

Heavy vehicles  are slower to start and they must keep a safe distance from the vehicle in front because they need more distance to stop.

Can the following car model take this into account?

Thank you

François Vaudrin
Faculté des Sciences et de Génie
Université Laval, CANADA
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