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Transit desert

Transit desert is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Transit desert rather than just read about it. In short: A transit desert is an area with limited transportation supply. Developed from the concept of food deserts, various methods have been proposed to measure transit deserts.

Transit desert — main illustration
Transit desert — illustration

Key takeaways

  • Transit desert belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Transit desert to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Transit desert from memory before moving on to harder problems.

Reference excerpt

A transit desert is an area with limited transportation supply. Developed from the concept of food deserts, various methods have been proposed to measure transit deserts. Transit deserts are generally characterized by poor public transportation options and possibly poor bike, sidewalk, or road infrastructure. The lack of transportation options present in transit deserts may have negative effects of people’s health, job prospects, and economic mobility.

History The term 'desert' has been variously applied to areas that lack key services like banks, food access, or even books. The idea of transit deserts was coined by Junfeng Jiao and Maxwell Dillivan, first appearing in print in 2013. Since that time, the concept of transit deserts has been expanded upon and competing definitions and measurement techniques have emerged.

Definitions

Gap-based measurements Gap-based measurement techniques are the most prominent and well-defined definition of transit deserts. Such methods typically use Geographic Information Systems (GIS) based methods to measure the gap between transportation supply and demand. These methods quantify demand and supply and then subtract demand from supply in order to find the "gap" in transit service. Areas that fall below a certain threshold are termed "transit deserts". Using this method studies have found that nearly all cities in the United States have transit deserts. Studies have also consistently shown that central business districts are almost never transit deserts, but the locations of transit desert areas varies considerably in different cities.

No-transit definition A more informal definition of transit deserts has also emerged in which areas that lack some type of transportation, most often public transportation like buses and subway stops, are termed transit deserts. Sometimes this definition has been expanded or slightly redefined to refer areas that lack a certain type of transportation such as "subway deserts".

Implications The causes of transit deserts are much debated. Some have cited suburban sprawl and deliberately segregationist policies as some of the leading causes of transit deserts. Still others contend that transit deserts are often the result of poor planning practices and that better transit planning can help alleviate them.

Examples

See also

References

External links Transit Deserts in Major US Cities UT Austin Transit Desert Index

Illustrations

Transit desert: Access to jobs by public transit in Toronto in 2016; note that the map does not include the extension of the western leg of Line 1 Yonge–University to the suburban municipality of Vaughan to the north-northwest, which opened in late 2017
Access to jobs by public transit in Toronto in 2016; note that the map does not include the extension of the western leg of Line 1 Yonge–University to the suburban municipality of Vaughan to the north-northwest, which opened in late 2017

Worked examples

Example 1 — a first encounter with Transit desert

Start with the simplest possible case. Write down what Transit desert claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Transit desert before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Transit desert ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Transit desert

In research
Transit desert appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Transit desert in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Transit desert is common in secondary-school and first-year university syllabi. It links to neighbouring topics Car culture, Economic geography, Freedom of movement, so understanding it makes those chapters shorter.
In everyday life
Look for Transit desert outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Transit desert in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Transit desert means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Transit desert out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Transit desert in simple terms?

A transit desert is an area with limited transportation supply. Developed from the concept of food deserts, various methods have been proposed to measure transit deserts.

Why does Transit desert matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Transit desert?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Transit desert.

Tags

  • Car culture
  • Economic geography
  • Freedom of movement
  • Metaphors referring to deserts
  • Neighbourhoods by type
  • Transport controversies
  • Transportation planning
  • Urban decay

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