Elaine Herzberg: First Person Killed by a Self-Driving Car

Elaine Herzberg was the first person killed by a self-driving car. On 18 March 2018 in Tempe, Arizona, an Uber test vehicle detected her and did not brake. On March 18, 2018, an Uber ATG test vehicle — a modified Volvo XC90 driving itself on a test loop in Tempe, Arizona — struck and killed Elaine Herzberg as she pushed a bicycle across N. Mill Avenue. This self driving uber car killed a pedestrian in what became the first known autonomous vehicle accident to take a life. The NTSB investigation found the automated driving system detected her 5.6 seconds before impact but never classified her as a pedestrian, because its design did not include consideration for people crossing outside a crosswalk. Every time it changed its mind about what she was, it discarded her tracking history. When it finally declared an emergency, 1.2 seconds out, a deliberate feature called action suppression held the brakes for one full second, with no alert to the operator. The Volvo's own factory emergency braking had been switched off while the test system drove. This is the full casefile on the uber self driving car accident: the design, the finding, and what was changed afterward. Watch next ▶ The Hyatt Regency Collapse:    • Kansas City Hyatt Regency Collapse: One Ro...   All casefiles ▶    • Margin of Error — Engineering Disaster Cas...   Chapters: 0:00 NINE FIFTY-EIGHT AT NIGHT 0:50 THE THING IT HAD NO WORD FOR 1:16 THE LOOP 2:45 WHAT THE CAR WAS ALLOWED TO SEE 4:15 FIVE POINT SIX SECONDS 5:28 THE SECOND THAT WAS BUILT IN 7:18 THE BRAKES THAT WERE ALREADY THERE 8:18 THE ONLY PERSON THE LAW COULD REACH 9:48 WHAT THEY CHANGED 10:36 THE CATEGORY YOU DON'T HAVE 11:32 THE DOOR Sources: NTSB/HAR-19/03, Collision Between Vehicle Controlled by Developmental Automated Driving System and Pedestrian, Tempe, Arizona, March 18, 2018 (adopted 19 Nov 2019) — the detection timeline, action suppression, the Volvo simulation, the probable cause and the postcrash changes; NTSB safety-issue page for the status of recommendations H-19-47 and H-19-48 (checked July 2026); Yavapai County Attorney declination letter (5 Mar 2019); reporting on the operator's July 2023 guilty plea and probation (AP/NPR); TechCrunch (27 Mar 2026) on current US robotaxi ridership. Load-Bearing History — the small decisions holding up the modern world. Margin of Error is our casefile series: forensic post-mortems of the smallest part of the story. New deep dive every week. Subscribe. #selfdriving #ai #engineering Imagery & footage: NTSB/HAR-19/03 §2.2.1 finding, NTSB/HAR-19/03 fig. 2 detail, NTSB/HAR-19/03 p.15 ADS data table, NTSB/HAR-19/03 fig. 5, NTSB/HAR-19/03 §1.6.2.2 Volvo simulation, NTSB/HAR-19/03 §3.2 probable cause, NTSB/HAR-19/03 §1.9 postcrash changes, NTSB recommendation status H-19-47 / H-19-48. Public-domain and Creative Commons sources; see each work's page for its license.