1) Yes 2) you can set minGap=0 to lower the size of accepted gaps. At high speeds you will not see adverse effects but gaps will probably appear too small at lower speeds. Some car-following models such as IDM require minGap as an additional buffer for collision-free driving.
Am Fr., 19. Juni 2020 um 11:55 Uhr schrieb Solmaz Razmi Rad - CITG < [email protected]>: > 1. So, the requireGap, depends on the followSpeed. And followSpeed > should be also influenced by “tau”. *Then the requireGap is always a > function of tau. Is this right?* Can I say, if I have a distribution for > tau, I will have a variation for gap acceptance (requireGap)? > > 2. And regarding the minGap, can I assume minGap=0 if lane change > happens without any jam? > > > > > > *From:* [email protected] <[email protected]> *On > Behalf Of *Jakob Erdmann > *Sent:* vrijdag 19 juni 2020 11:39 > *To:* Sumo project User discussions <[email protected]> > *Subject:* Re: [sumo-user] Gap acceptance in lane changing > > > > 1) yes > > 2) these are computed by the car-follow model functions. They generally > are consistent with the followSpeed function so that neither the ego > vehicle nor its follower on the target lane have to perform any extra > braking after the lane change is completed. > > 3) if a jam develops immediately after lane changing, vehicles must still > be able to maintain the configured minGap, thus the value is already > considered during lane changing > > > > > > > > Am Fr., 19. Juni 2020 um 11:26 Uhr schrieb Solmaz Razmi Rad - CITG < > [email protected]>: > > Hi there, > > > > I am trying to investigate the impact of gap acceptance in lane changing > around on-ramps on the capacity of a freeway. I want to use a distribution > for the gaps accepted while lane changing. I realized that the parameter > which controls the gap acceptance is “lcAssertive” (But if I understood > correctly, lcAssertive can influence the size of accepted gap but it > doesn’t define the gap itself) . The SUMO vehicle definitions state that > "the required gap is divided by the value of lcAssertive". When searching > for the definition of requiredGap, I came across this page ( > http://sumo-user-mailing-list.90755.n8.nabble.com/sumo-user-lcAssertive-Behavior-td3244.html > <https://urldefense.proofpoint.com/v2/url?u=http-3A__sumo-2Duser-2Dmailing-2Dlist.90755.n8.nabble.com_sumo-2Duser-2DlcAssertive-2DBehavior-2Dtd3244.html&d=DwMFaQ&c=XYzUhXBD2cD-CornpT4QE19xOJBbRy-TBPLK0X9U2o8&r=VL7LZgp9uGc2UAWfyMuvx0_-p-5L033DSD_Kyqc84V0&m=Azr-wRMy-oqbdQPxVMa10suRW_8GP2m1_exyRCASvLs&s=1_X9_XuHTSeys_pvvjFkk9IqsmM1Ut-3853wSBryXAE&e=> > ) > where Jakob explained about requiredGap: “requiredGap = secureBackGap + > followerMinGap + subjectLength + subjectMinGap + secureFrontGap”. > > I have a couple of questions here: > > 1. What exactly is requiredGap? Is this the same as the accepted > gap in lane changing? > > 2. How are secureBackGap or secureFrontGap defined? Is there any > relation between tau and secureBackGap or secureFrontGap? > > 3. From what I have understood, MinGap is the jam distance or the > distance which vehicles keep when standstill. How does this contribute to > gap acceptance in lane changing? > > I appreciate your help in advance. > > > > Regards, > > Solmaz > > > > _______________________________________________ > sumo-user mailing list > [email protected] > To unsubscribe from this list, visit > https://www.eclipse.org/mailman/listinfo/sumo-user > <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.eclipse.org_mailman_listinfo_sumo-2Duser&d=DwMFaQ&c=XYzUhXBD2cD-CornpT4QE19xOJBbRy-TBPLK0X9U2o8&r=VL7LZgp9uGc2UAWfyMuvx0_-p-5L033DSD_Kyqc84V0&m=Azr-wRMy-oqbdQPxVMa10suRW_8GP2m1_exyRCASvLs&s=biv3B1xwRStkY_qfVxHwgFeamxhI4u9lW005-8eH1Zo&e=> > > _______________________________________________ > sumo-user mailing list > [email protected] > To unsubscribe from this list, visit > https://www.eclipse.org/mailman/listinfo/sumo-user >
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