What the world's most advanced traffic system can—and can't—do for the city that invented gridlock.
What infrastructure mystery keeps you up at night? Submit your Service Request by recording a voice memo with your question and emailing it to <a href="mailto:servicerequest@99pi.org" rel="noopener noreferrer">servicerequest@99pi.org</a>.
<a href="https://99percentinvisible.org/sr" target="_blank" rel="noopener noreferrer">Service Request</a> is a production of <a href="https://99percentinvisible.org/" target="_blank" rel="noopener noreferrer">99% Invisible</a> and <a href="https://www.campsidemedia.com/" target="_blank" rel="noopener noreferrer">Campside Media</a>.
Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early.&nbsp;Start a free trial now on Apple Podcasts or by visiting <a href="http://siriusxm.com/podcastsplus." target="_blank">siriusxm.com/podcastsplus</a>.&nbsp; Hosted by Simplecast, an AdsWizz company. See <a href="https://pcm.adswizz.com">pcm.adswizz.com</a> for information about our collection and use of personal data for advertising.

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Service Request #2: Why Is This Red Light So Damn Long?

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