The Batman and the Bridge Builder
99% Invisible23 Feb 2021

The Batman and the Bridge Builder

Mark Bloschock is an engineer from Texas, and in the late 1970s he got a job with the Texas Department of Transportation renovating the Congress Avenue Bridge. The bridge was a simple concrete arch bridge that spans Lady Bird Lake in downtown Austin. It needed to be rebuilt with more contemporary beams called “box beams.” The box beams sit below the road’s surface, and they needed to be spaced a certain distance apart. Bloschock and the other engineers decided that the gap should be somewhere between ¾ of an inch and an inch and a half, which didn’t seem like a particularly meaningful decision… until the bats moved in.

A tale of bats and bridges and how the built environment and the natural environment don’t need to be at odds with one another.

The Batman and the Bridge Builder

Plus, we talk with Simon Doble, CEO of Solar Buddy. Light access (both day and night) is a basic need many people take for granted. SolarBuddy is an Australian charity uniting a global community with a big dream to gift six million solar lights to children living in energy poverty by 2030, to help them to study after dusk and improve their education outcomes.

99% Invisible’s Impact Design coverage is supported by Autodesk. The Autodesk Foundation supports the design and creation of innovative solutions to the world’s most pressing social and environmental challenges. Learn more about these efforts on Autodesk’s Redshift, which tells stories about the future of making across architecture, engineering, infrastructure and manufacturing.

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Longbox (Repeat)

Longbox (Repeat)

Reporter Whitney Jones argues that R.E.M.’s Out of Time is the most politically significant album in the history of the United States. Because of its packaging. Longbox Please Vote. Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus.

27 Sep 201618min

The Trend Forecast

The Trend Forecast

Who decides that the color this season is “mint green” or that denim jackets are “back?” Of course, there’s top-down fashion, where couture houses and runway shows set a trend that trickles down through the rest of the industry. Then … Continue reading → Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus.

20 Sep 201615min

Making Up Ground

Making Up Ground

Large portions of San Francisco, New York City, Boston, Seattle, Hong Kong and Marseilles were built on top of human made land. What is now Mumbai, India, was transformed by the British from a seven-island archipelago to one contiguous strip … Continue reading → Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus.

13 Sep 201618min

Public Works

Public Works

Infrastructure makes modern civilization possible. Roads, power grids, sewage systems and water networks all underpin society as we know it, forming the basis of our built environment … at least when they work. As Henry Petroski documents in The Road … Continue reading → Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus.

6 Sep 201613min

On Average

On Average

In many ways, the built world was not designed for you. It was designed for the average person. Standardized tests, building codes, insurance rates, clothing sizes, The Dow Jones – all these measurements are based around the concept of an … Continue reading → Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus.

23 Aug 201617min

Photo Credit

Photo Credit

Founded by architect Walter Gropius in 1919, the Bauhaus school in Germany would go on to shape modern architecture, art, and design for decades to come. The school sought to combine design and industrialization, creating functional things that could be … Continue reading → Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus.

17 Aug 201618min

A Sea Worth its Salt

A Sea Worth its Salt

The largest body of water in California was formed by a mistake. In 1905, the California Development Company accidentally flooded a huge depression in the Sonora Desert, creating an enormous salty lake called the Salton Sea. The water is about … Continue reading → Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus.

9 Aug 201617min

The Magic Bureaucrat

The Magic Bureaucrat

In 1996, President Bill Clinton and the Congress undertook a reform effort to redesign the welfare system from one that many believed trapped people in a cycle of dependence, to one, that in the President’s words, would give people “a … Continue reading → Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus.

3 Aug 201632min

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