"- Picture two conversations sharing a congested gateway as two separate train tracks with one common section.www.pollere.net/Pdfdocs/QrantJul06.pdf
- When a blue train waits for red trains to go through the shared section, the blue trains behind it catch up (get more clumped)
- If the merge rules are efficient (service each color to exhastion), the system clumps exponentially fast.
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