This paper analyzes the emergence of two well-defined peaks during the morning peak period in the traffic flow diurnal curve. It selects six California cities as research targets, and uses California employment and household travel survey data to explain how and why this phenomenon has risen during the pandemic. The final result explains that the double-humped phenomenon results from the change in the composition of commuters during the morning peak period after the outbreak.

中文翻译：

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峰值的分叉：COVID-19 时代流量峰值的新模式

本文分析了交通流量日曲线中早高峰时段出现的两个明确的峰值。它选择了加州的六个城市作为研究对象，并利用加州就业和家庭旅行调查数据来解释这种现象在大流行期间如何以及为什么会上升。最终结果说明，双峰现象是疫情爆发后早高峰时段通勤者构成变化的结果。