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Re: [sumo-user] How the understand the attribute " actuated " of traffic lights
- switch means: end the current green phase and transition to the next green phase (in a fixed succession of phases)
- timeHeadwayInApproach is the time gap between successive vehicles in lanes that have the green light in the current phase
- delay in approach is the sum of delays incurred (due to standing or driving slower than the speed limit) by all vehicles in lanes that have the green light in the current phase

2018-06-22 0:44 GMT+02:00 Jane Cheung <cheung180515@xxxxxxxxx>:
As a reply, the "Switch'means that the traffic lights will change the phase?
What do  the "timeHeadWayInApproach" and "delayInApproach " mean"? How to get the two parameters?

Regards!
Jane

On Thu, Jun 21, 2018 at 1:06 AM Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
Both controllers have a trivial formula that only consists of one inequality each:

actuated: if (timeHeadWayInApproach > criticalHeadway) ... switch
delay_based: if (delayInApproach < threshold) ... switch

2018-06-21 0:35 GMT+02:00 Jane Cheung <cheung180515@xxxxxxxxx>:
Thank you  Jakob,
 Additional question, there are mathematical formulas that  are  used to describe the relationships or not?

Best regards！



On Wed, Jun 20, 2018 at 12:45 AM Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:

2018-06-20 1:26 GMT+02:00 Jane Cheung <cheung180515@xxxxxxxxx>:
Hi, guys,
       Could someone tell me  how  " actuated" type traffic lights work? 
       What factors are used to actuate the duration of each phase, the  number of cars  that are going to be waiting for at the junction or the other factors? What's more, how does SUMO get  that factors?



Best regard!

Jane

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