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Week 8 Quiz

Checking whether this week's pedestrian-flow reading landed.

Week 8

Four questions on measuring a pedestrian pile-up as a fluid-dynamics problem.

1. According to the lecture, what makes a sudden stop the "cleanest" disruption to measure?

It's one of the few genuinely instantaneous disruptions the course studies
It happens the exact same way every single time
It is always caught on camera
Nobody nearby is ever actually affected by it

2. What two things does the lecture say determine how far a pile-up propagates?

Footpath width and crowd density
The stopper's height and weight
Time of day and the weather
Whether the stop happens near a public bin

3. Whose own research does the lecture say this week's material draws on directly?

Mr. Osei's
Dr. Vance's
Ms. Halvorsen's
An anonymous public survey

4. Two people both stop to check a phone notification on a crowded footpath — one mid-flow, one stepped aside first. Why does only one of them cause a pile-up?

Stepping aside removes the stop from the main flow entirely, so nobody behind has to react to it
The one mid-flow was walking slower to begin with
Pile-ups are random and unrelated to where someone stops
Only stops longer than one minute cause any disruption at all

Related

Week 8: A Fluid-Dynamics Inquiry into Discontinuity Propagation in Ambulatory Flow
Week 8 Tutorial: Measuring a Pile-Up

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