There are multiple contenders when it comes to the question of who invented the traffic light. This episode looks at a few of the moments in traffic light history that got us to where we are today, as well as what made them a necessity in the first place. 

 Learn more about your ad-choices at https://www.iheartpodcastnetwork.com

There are multiple contenders when it comes to the question of who invented the traffic light. This episode looks at a few of the moments in traffic light history that got us to where we are today, as well as what made them a necessity in the first place.  Learn more about your ad-choices at <a href="https://www.iheartpodcastnetwork.com">https://www.iheartpodcastnetwork.com</a>

Join Holly and Tracy as they bring you the greatest and strangest Stuff You Missed In History Class in this podcast by iHeartRadio.

Stuff You Missed in History Class

The Rise of the Traffic Light

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/9642b643-700c-41cd-aff9-ae28003c0821/transcript

This 2019 episode marked 100 years since a wave of racist violence in the U.S. that became known as Red Summer. In many ways, Red Summer was a response to (but NOT caused by) two earlier events: the Great Migration and the return of black soldiers who had fought in World War I.

This 2019 episode marked 100 years since a wave of racist violence in the U.S. that became known as Red Summer. In many ways, Red Summer was a response to (but NOT caused by) two earlier events: the Great Migration and the return of black soldiers who had fought in World War I.

SYMHC Classics: Red Summer 1919

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/4c1c6b70-8c61-434f-b5ae-b43c017676c4/transcript

Holly and Tracy commiserate about sending greeting cards. Tracy talks about how she shifted away from an episode exclusively about Frances Thompson.

Holly and Tracy commiserate about sending greeting cards. Tracy talks about how she shifted away from an episode exclusively about Frances Thompson.

Behind the Scenes Minis: Greetings and Context

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/0730cbe0-425a-47e7-aa8e-b43c0174a000/transcript

The Memphis Massacre was a truly horrific wave of destruction and violence, including sexual violence, against the Black community of Memphis just a year after the end of the U.S. Civil War.

Research:
“Memphis Daily Appeal Interviews Frances Thompson (1876),” SHEC: Resources for Teachers, accessed April 9, 2026, https://shec.ashp.cuny.edu/items/show/3717.
“The Outrage Mill.” The North Missouri Register. 9/14/1876.
“The Reports of the Committees of the House of Representatives Made during the First Session Thirty-ninth Congress, 1865-’66.” Washington: Government Printing Office. https://www.govinfo.gov/app/details/SERIALSET-01274_00_00-002-0101-0000/context
Blank, Christopher. “Do The Words 'Race Riot' Belong On A Historic Marker In Memphis?” Code Switch. NPR. 5/2/2016. https://www.npr.org/sections/codeswitch/2016/05/02/476450908/in-memphis-a-divide-over-how-to-remember-a-massacre-150-years-later
Britannica Editors. "Memphis massacre of 1866". Encyclopedia Britannica, 15 Feb. 2024, https://www.britannica.com/event/Memphis-Race-Riot. Accessed 8 April 2026.
Carriere, Marius. “An Irresponsible Press: Memphis Newspapers and the 1866 Riot.” Tennessee Historical Quarterly , Spring 2001, Vol. 60, No. 1. https://www.jstor.org/stable/42628498
Davis, Justin A. “How a disabled Black trans woman left her mark on 19th-century Memphis.” The Emancipator. 6/13/2024. https://theemancipator.org/2024/06/13/topics/histories/how-a-disabled-black-trans-woman-left-her-mark-on-19th-century-memphis/
Donald, Bernice Bouie. “When the Rule of Law Breaks Down: Implications of the 1866 Memphis Massacre for the Passage of the Fourteenth Amendment.” Boston Law Review. Vol. 98. 2018.
Equal Justice Institute. “On this day - Apr 30, 1866: White Police and Mobs Terrorize and Kill Black Residents in Memphis.” https://calendar.eji.org/racial-injustice/apr/30
Harper’s Weekly. “The Memphis Riots.” 5/26/1866.
Johnson, Charles F. and T.W. Gilbreth. “The Freedmen’s Bureau Report on the Memphis Race Riots of 1866.” 5/22/1866. https://teachingamericanhistory.org/document/the-freedmens-bureau-report-on-the-memphis-race-riots-of-1866/
Kimberley, Lewis. “’If you kill him, you have got to kill me first’: examining individual and collective loyalties during the Memphis Massacre (1866).” American Nineteenth Century History. Vol. 25, 2024. https://www.tandfonline.com/doi/full/10.1080/14664658.2024.2316465
O’Donovan, Susan and Beverly Bond. “ ‘A History They Can Use’: The Memphis Massacre and Reconstruction’s Public History Terrain.” The Journal of the Civil War Era. 8/15/2016. https://www.journalofthecivilwarera.org/2016/08/history-can-use-memphis-massacre-reconstructions-public-history-terrain/
Stryker, Susan. “To Appear As We Please.” Aperture, Winter 2017, No. 229, Future Gender. Via JSTOR. https://www.jstor.org/stable/44898154
Walker, Barrington. “'This is the White Man's Day': The Irish, White Racial Identity, and the 1866 Memphis Riots.” Left History. Vol. 5, No. 2, 1997. https://doi.org/10.25071/1913-9632.5336

The Memphis Massacre was a truly horrific wave of destruction and violence, including sexual violence, against the Black community of Memphis just a year after the end of the U.S. Civil War.
Research:
<ul>
<li>&ldquo;Memphis Daily Appeal Interviews Frances Thompson (1876),&rdquo; SHEC: Resources for Teachers, accessed April 9, 2026, https://shec.ashp.cuny.edu/items/show/3717.</li>
<li>&ldquo;The Outrage Mill.&rdquo; The North Missouri Register. 9/14/1876.</li>
<li>&ldquo;The Reports of the Committees of the House of Representatives Made during the First Session Thirty-ninth Congress, 1865-&rsquo;66.&rdquo; Washington: Government Printing Office. https://www.govinfo.gov/app/details/SERIALSET-01274_00_00-002-0101-0000/context</li>
<li>Blank, Christopher. &ldquo;Do The Words 'Race Riot' Belong On A Historic Marker In Memphis?&rdquo; Code Switch. NPR. 5/2/2016. https://www.npr.org/sections/codeswitch/2016/05/02/476450908/in-memphis-a-divide-over-how-to-remember-a-massacre-150-years-later</li>
<li>Britannica Editors. "Memphis massacre of 1866". Encyclopedia Britannica, 15 Feb. 2024, https://www.britannica.com/event/Memphis-Race-Riot. Accessed 8 April 2026.</li>
<li>Carriere, Marius. &ldquo;An Irresponsible Press: Memphis Newspapers and the 1866 Riot.&rdquo; Tennessee Historical Quarterly , Spring 2001, Vol. 60, No. 1. https://www.jstor.org/stable/42628498</li>
<li>Davis, Justin A. &ldquo;How a disabled Black trans woman left her mark on 19th-century Memphis.&rdquo; The Emancipator. 6/13/2024. https://theemancipator.org/2024/06/13/topics/histories/how-a-disabled-black-trans-woman-left-her-mark-on-19th-century-memphis/</li>
<li>Donald, Bernice Bouie. &ldquo;When the Rule of Law Breaks Down: Implications of the 1866 Memphis Massacre for the Passage of the Fourteenth Amendment.&rdquo; Boston Law Review. Vol. 98. 2018.</li>
<li>Equal Justice Institute. &ldquo;On this day - Apr 30, 1866: White Police and Mobs Terrorize and Kill Black Residents in Memphis.&rdquo; https://calendar.eji.org/racial-injustice/apr/30</li>
<li>Harper&rsquo;s Weekly. &ldquo;The Memphis Riots.&rdquo; 5/26/1866.</li>
<li>Johnson, Charles F. and T.W. Gilbreth. &ldquo;The Freedmen&rsquo;s Bureau Report on the Memphis Race Riots of 1866.&rdquo; 5/22/1866. https://teachingamericanhistory.org/document/the-freedmens-bureau-report-on-the-memphis-race-riots-of-1866/</li>
<li>Kimberley, Lewis. &ldquo;&rsquo;If you kill him, you have got to kill me first&rsquo;: examining individual and collective loyalties during the Memphis Massacre (1866).&rdquo; American Nineteenth Century History. Vol. 25, 2024. https://www.tandfonline.com/doi/full/10.1080/14664658.2024.2316465</li>
<li>O&rsquo;Donovan, Susan and Beverly Bond. &ldquo; &lsquo;A History They Can Use&rsquo;: The Memphis Massacre and Reconstruction&rsquo;s Public History Terrain.&rdquo; The Journal of the Civil War Era. 8/15/2016. https://www.journalofthecivilwarera.org/2016/08/history-can-use-memphis-massacre-reconstructions-public-history-terrain/</li>
<li>Stryker, Susan. &ldquo;To Appear As We Please.&rdquo; Aperture, Winter 2017, No. 229, Future Gender. Via JSTOR. https://www.jstor.org/stable/44898154</li>
<li>Walker, Barrington. &ldquo;'This is the White Man's Day': The Irish, White Racial Identity, and the 1866 Memphis Riots.&rdquo; Left History. Vol. 5, No. 2, 1997. https://doi.org/10.25071/1913-9632.5336</li>
</ul>

The Memphis Massacre was a truly horrific wave of destruction and violence, including sexual violence, against the Black community of Memphis just a year after the end of the U.S. Civil War.

The Memphis Massacre

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/2583c7b8-5e76-4e36-bed6-b439005be35b/transcript

The Rise of the Traffic Light

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