Add 2021 Septa budget sankey diagram

src/posts/septa_budget_2021.md

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+---
+title: 2021 SEPTA Budget Breakdown
+layout: post.liquid
+published_date: 2022-07-18 00:00:00 +0000
+slug: septa_budget
+is_draft: false
+description: |
+  Philadelphia's transit agency SEPTA 2021 Budget numbers turned into a Sankey visualization.
+---
+
+<style>
+table tbody tr:hover {
+  background: #f8f1dd;
+}
+</style>
+
+# 2021 SEPTA Budget Breakdown
+
+_Published in July 2022_
+
+<p class="illuminated">
+  Every year Philadelphia's transit agency <span style="font-variant:small-caps;">septa</span>{% capture sidenote %}SouthEastern Pennsylvania Transportation Authority.{% endcapture %}{% include "sidenote.liquid" %}
+  publishes budget figures.{% capture sidenote %}The reports page with many PDFs for download including the 2021 budget: <a href="https://planning.septa.org/reports/">https://planning.septa.org/reports/</a> (<a href="https://web.archive.org/web/20220615033618/https://planning.septa.org/reports/">archived link</a>).{% endcapture %}{% include "sidenote.liquid" %}
+  There is a lot of information in the document, both a high level table and many further breakdowns.
+</p>
+
+I thought it would be interesting to read through the numbers and build a
+Sankey diagram{% capture sidenote %}<a href="https://en.wikipedia.org/wiki/Sankey_diagram">https://en.wikipedia.org/wiki/Sankey_diagram</a>{% endcapture %}{% include "sidenote.liquid" %}
+showing several levels of expenses and revenue broken down by category.
+
+Starting at the highest level this is the top level budget for the entire organization:
+
+### 2021 Budget Breakdown 
+
+ Revenue                          | Amount in Thousands
+ :------------------------------- | ------------------:
+ Passenger Revenue                |   480,574
+ Shared Ride Program              |    16,250
+ Other Income                     |    42,188
+ Investment Income                |     2,756
+ &nbsp;                           | ---------
+ *Total Operating Revenue*        |   541,768
+
+ Subsidy                          | &nbsp;
+ :------------------------------- | ------------------:
+ Federal                          |    93,028
+ State                            |   779,377
+ Local                            |   112,451
+ Other                            |     4,360
+ &nbsp;                           | ---------
+ *Total Subsidy*                  |   989,216
+
+ Expenses                         | &nbsp;
+ :------------------------------- | ------------------:
+ Labor and Fringe Benefits        | 1,088,773
+ Material and Services            |   331,432
+ Injury and Damage Claims         |    24,711
+ Propulsion Power                 |    27,313
+ Fuel                             |    26,026
+ Vehicle and Facility Rentals     |     8,854
+ &nbsp;                           | ---------
+ *Operating Expense*              | 1,507,109
+ Depreciation/Contributed Capital |    23,875
+ &nbsp;                           | ---------
+ **Total Expenses**               | **1,530,984**
+
+
+Note that the subsidies (mostly from the state of Pennsylvania) exactly cover
+the gap between expenses and revenue.
+
+I found the high level table a little lacking in detail, so I read further and
+tried to pull out numbers from the various breakdown tables in the document
+and align them to the overview table so we can see more detail of where money
+is coming from and where it's spent.
+
+Here is a visualization of the budget as a Sankey diagram:
+
+<figure class="fullwidth">
+  <a href="interactive/" target="_blank" style="text-decoration:none;background:none;text-shadow:none">
+    <img src="SEPTA_2021_Budget_sankey.png" alt="Sankey diagram breaking down SEPTA 2021 Budget numbers by various catagories" title="Sankey diagram breaking down SEPTA 2021 Budget numbers by various catagories">
+  </a>
+</figure>
+
+ - Click the image for a larger interactive view.
+ - Download the chart as an image [SEPTA_2021_Budget_sankey.png](SEPTA_2021_Budget_sankey.png)
+
+This represents my best-guess understanding at the data as-is from the PDF.