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 ) 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
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