[sumo-user] Question about TTC and PET definition

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[sumo-user] Question about TTC and PET definition

From: "Emily Z." <lanzhang.ufl@xxxxxxxxx>
Date: Fri, 14 Dec 2018 17:41:56 -0500
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Hi,

I have a question about the safety surrogate measures in SSM output. According the descriptions of TTC and PET on the webpage, these two measures seem to have the same meaning. In my understanding, they all measures the collision time, and PET can be a special case of TTC for crossing and merging scenarios.

Is that correct? Otherwise, what are differences between TTC and PET?

Thanks for you help!

Best regards,

Lan

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