Hello, In order to simulate the start-up lost time in sumo, I think the mechanism and effect of using"u", using extral red time and using traci.vehicle.setactionsteplength are the same. Am I right? Best reagrds, Kevin
获取 Outlook for Android<https://aka.ms/ghei36> ________________________________ From: [email protected] <[email protected]> on behalf of Jakob Erdmann <[email protected]> Sent: Wednesday, December 9, 2020 4:58:21 PM To: Sumo project User discussions <[email protected]> Subject: Re: [sumo-user] 回复: start-up lost time Hello, 'u' encodes 'upcoming green'. In the real world this can often be found as 'red+amber' lights. In the simulation it is shown as orange. Vehicles treat this like a red phase. The main use of 'u' over 'r' is to make the program easier to interpret by the human viewer. regards, Jakob Am Mi., 9. Dez. 2020 um 08:45 Uhr schrieb q kevin <[email protected]<mailto:[email protected]>>: Hello Jakob， I read the description of 'u' on sumo's website(traffic signal light), but I didn't understand what its actual role was. Because I saw in the post https://github.com/eclipse/sumo/issues/7832 that someone uses 'u' to simulate the start-up lost time of a vehicle when traffic signal light changes from red to green , I want to know what its role is. Would you please explain? Best regards, Kevin ________________________________ 发件人: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>> 代表 Jakob Erdmann <[email protected]<mailto:[email protected]>> 发送时间: 2020年12月8日 19:43 收件人: Sumo project User discussions <[email protected]<mailto:[email protected]>> 主题: Re: [sumo-user] start-up lost time Yes. The headways measured at the stop line decrease from ~3.5s to ~2s over the first 4 vehicles. The effect is fairly robust relative to simulation step length and action step length and depends strongly on the desired vehicle acceleration and of course desired headways (tau). However, there is currently no way to calibrate this independently for startup and general car-following. For a discussion and implementation plan, see https://github.com/eclipse/sumo/issues/7832 regards, Jakob Am Di., 8. Dez. 2020 um 05:54 Uhr schrieb 邱 开来 <[email protected]<mailto:[email protected]>>: Dear everyone, I want to know if the vehicle start at the intersection is the same as the real situation shown in the figure,when the signal light changes from red to green? If not， how to achieve this effect Thank you! Best Regards, Kevin _______________________________________________ sumo-user mailing list [email protected]<mailto:[email protected]> To unsubscribe from this list, visit https://www.eclipse.org/mailman/listinfo/sumo-user _______________________________________________ sumo-user mailing list [email protected]<mailto:[email protected]> To unsubscribe from this list, visit https://www.eclipse.org/mailman/listinfo/sumo-user
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