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socialmeritwarrior t1_j7fs7xp wrote

If it's % Change from Baseline, why do literally none of the lines start at the baseline?

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DataMan62 t1_j7jgkk8 wrote

Cars do! Amtrak was up almost 20%. They had a good Jan 2020. The others were less than 10% above baseline.

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socialmeritwarrior t1_j7jhjbv wrote

But what's the baseline? Nothing in the presented data states that. If you aren't showing the baseline on the graph itself, you need to explicitly state what it is and neither was done here.

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DataMan62 t1_j7jk4o6 wrote

Good question. I am disappointed in the extreme lack of definition and explanation on almost all the graphs in this group.

But baseline means the average daily ridership. Maybe that’s averaged over the years by month, week, day of week or calendar date. But however the baseline is determined, any given day is almost guaranteed to be at least a little different from the baseline. All of the curves start within 20% of baseline. All but one within 10%. That is normal.

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PhilRubdiez t1_j7g8vme wrote

Could be that the baseline is in March 2020. That’s about when all of the lockdowns and panic really started. It also is about where all modes cross 0%.

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