engineering

Juan de Dios Ortúzar

Juan de Dios Ortúzar is a engineering 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 Juan de Dios Ortúzar rather than just read about it. In short: Juan de Dios Ortúzar Salas (born 24 January 1949) is a Chilean industrial engineer and Emeritus Professor at the Pontifical Catholic University of Chile (PUC). Regarded as a pioneer of discrete-choice modelling, he developed methods for estimating travellers’ willingness to pay for safer, cleaner and quicker journeys.

Key takeaways

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

Reference excerpt

Juan de Dios Ortúzar Salas (born 24 January 1949) is a Chilean industrial engineer and Emeritus Professor at the Pontifical Catholic University of Chile (PUC). Regarded as a pioneer of discrete-choice modelling, he developed methods for estimating travellers’ willingness to pay for safer, cleaner and quicker journeys.

Early life and education Ortúzar earned a BSc in mathematics and a civil-engineering degree at PUC. He moved to the United Kingdom in 1973 to study at the University of Leeds, receiving an MSc in transport planning in 1974 and a PhD in 1980 for research on discrete choice modelling.

Academic career Ortúzar joined PUC's Department of Transport Engineering on returning to Chile, became full professor in 1986 and was named Professor Emeritus in 2016. He directed the first origin-destination survey of Greater Santiago (1991) and launched the city's continuous household travel survey in 2001. He helped to found the Institute for Complex Engineering Systems (2007); the BRT⁺ Centre of Excellence for Bus Rapid Transit (2010); and the Centre for Sustainable Urban Development (CEDEUS) in 2012.

Research and influence Combining stated-preference and revealed-preference data, Ortúzar's work quantifies how travellers trade time, money, safety and environmental quality. The valuation techniques devised with his group have been applied in appraisal studies and legal cases in Australia, Colombia, Germany, Norway and Spain. His interdisciplinary projects range from social-housing location and urban road pricing to preferences for Chilean wine.

Publications Ortúzar has authored or co-authored more than 200 refereed papers. His textbook Modelling Transport, written with Luis G. Willumsen, is a standard reference in the field and reached its fifth edition in 2024.

Selected works Ortúzar J. de D. & Willumsen L. G., Modelling Transport (5th ed., Wiley, 2024). Caussade S.; Ortúzar J. de D.; Rizzi L. I.; Hensher D. A. “Assessing the influence of design dimensions on stated-choice experiment estimates.” Transportation Research B 39 (2005). Sillano M. & Ortúzar J. de D. “Willingness-to-pay estimation with mixed logit models.” Environment and Planning A 37 (2005).

Honours Among other distinctions, Ortúzar received the Alexander von Humboldt Research Award (2010), the Lifetime Achievement Award of the International Association for Travel Behaviour Research (2012), and an honorary doctorate from the University of Cantabria, Spain (2018).

References

External links PUC profile Google Scholar

Illustrations

Worked examples

Example 1 — a first encounter with Juan de Dios Ortúzar

Start with the simplest possible case. Write down what Juan de Dios Ortúzar claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, 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 Juan de Dios Ortúzar 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 Juan de Dios Ortúzar 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 Juan de Dios Ortúzar

In research: Juan de Dios Ortúzar appears in engineering 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 Juan de Dios Ortúzar 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: Juan de Dios Ortúzar is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1949 births, Alumni of the University of Leeds, Chilean engineers, so understanding it makes those chapters shorter.
In everyday life: Look for Juan de Dios Ortúzar 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 Juan de Dios Ortúzar in 20 minutes

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

Frequently asked questions

What is Juan de Dios Ortúzar in simple terms?

Why does Juan de Dios Ortúzar matter?

Because it connects several engineering 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 Juan de Dios Ortúzar?

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 Juan de Dios Ortúzar.