A vehicle with lower deceleration requires a larger safety gap to any leader vehicle and this can impact acceleration. A vehicle with decel=0 does not have a well-defined breaking distance (decel sets an upper bound on braking ability). Thus it cannot follow another vehicle safely at any speed.
Am Mo., 27. Apr. 2020 um 16:20 Uhr schrieb Bae, Jong In <[email protected]>: > Thank you Jakob for your help. > > I have a follow up question on 'SetDecel' function. > > When I'm trying to bring the speed back up, the vehicle won't accelerate > when Decel = 0. > And lower acceleration rate was found with lower deceleration value. > Once the deceleration value was restored to the original value (4.5), the > vehicle speed was restored as previous condition. > > setSpeed was set as -1 so the vehicle was no longer under the influence of > any speed function. > > I was wondering how the deceleration value affects the acceleration rate > in SUMO. > > Thank you! > ------------------------------ > *From:* [email protected] <[email protected]> on > behalf of Jakob Erdmann <[email protected]> > *Sent:* Monday, April 27, 2020 6:02 AM > *To:* Sumo project User discussions <[email protected]> > *Subject:* Re: [sumo-user] Speed output with 'SetDecel = 0' > > Hello, > - getSpeedWithoutTraci does not affect vehicle speed > - the combined effort of setSpeed(vehID, 0) and setDecel(vehID, 0) is that > the vehicle tries to decelerate to 0 but cannot do this (because the > maximum deceleration is 0) and therefore remains at constant speed. > - to reset the influence of a prior setSpeed command and restore sumo > speed control, call setSpeed(vehID, -1) > > regards, > Jakob > > Am So., 26. Apr. 2020 um 04:49 Uhr schrieb Bae, Jong In <[email protected] > >: > > Hello, > > In my scenario, I changed my vehicle's speed and deceleration to 0 using > 'setSpeed' and 'setDecel'. > Then I used 'getSpeedWithoutTraCI' to get rid of the influence of traci on > my vehicle's speed (and in order to bring the speed back according to the > traffic condition). > But the speed of the vehicle doesn't increase but is stuck at 1.47m/s even > when the space in front of the vehicle clears up. > > Does assigning 'setDecel = 0' influence the acceleration of the vehicle as > well? > > Thank you. > _______________________________________________ > sumo-user mailing list > [email protected] > To unsubscribe from this list, visit > https://www.eclipse.org/mailman/listinfo/sumo-user > > _______________________________________________ > sumo-user mailing list > [email protected] > To unsubscribe from this list, visit > https://www.eclipse.org/mailman/listinfo/sumo-user >
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