diff --git a/events.csv b/events.csv
index ae067c8..5b7ed33 100644
--- a/events.csv
+++ b/events.csv
@@ -202,4 +202,5 @@ date,event_type,company,city,geometry_file,vehicles,platform,fares,direct_bookin
 2026-03-23,service_announced,XPeng,Guangzhou,"113.259006,23.128845",,Amap,,,Flexible,Autonomous,,,2027-01-01,,,https://www.selfdrivingcars360.com/xpengs-new-robotaxi-business-unit-targets-driverless-l4-operations-in-2027/,"XPeng established Robotaxi Business Unit on March 23, 2026. Plans passenger-carrying demonstration operations in H2 2026, with driverless operations (no safety driver) targeted for early 2027. Three robotaxi models announced (5-seat, 6-seat, 7-seat) priced under 200,000 CNY. Uses VLA 2.0 autonomous driving model with no LiDAR or HD maps."
 2026-03-19,service_announced,Rivian,San Francisco,"-122.407520,37.787936",Rivian R2,Uber,,,Flexible,Autonomous,,Uber,2028,,,https://www.theverge.com/transportation/897105/uber-rivian-robotaxi-investment-deal,"Partnership to deploy 10,000 autonomous R2 vehicles starting in San Francisco and Miami in 2028; subject to regulatory approval"
 2026-03-19,service_announced,Rivian,Miami,"-80.1918,25.7617",Rivian R2,Uber,,,Flexible,Autonomous,,Uber,2028,,,https://www.theverge.com/transportation/897105/uber-rivian-robotaxi-investment-deal,"Partnership to deploy 10,000 autonomous R2 vehicles starting in San Francisco and Miami in 2028; subject to regulatory approval"
-2026-03-24,service_announced,Zoox,Austin,"-97.743700,30.271129",,,No,,,Autonomous,Waitlist,,,,,https://www.theverge.com/transportation/899323/zoox-robotaxi-las-vegas-san-francisco-austin-miami,Initial service limited to employees and family/friends before opening to waitlist. Article mentions Miami as well but Austin extracted per multi-city rules.
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+2026-03-24,service_announced,Zoox,Austin,"-97.743700,30.271129",,,No,,,Autonomous,Waitlist,,,,,https://www.theverge.com/transportation/899323/zoox-robotaxi-las-vegas-san-francisco-austin-miami,Initial service limited to employees and family/friends before opening to waitlist. Article mentions Miami as well but Austin extracted per multi-city rules.
+2026-03-31,geometry_updated,Tesla,Austin,tesla_austin_expansion_20260331.geojson,,,,,,,,,,,,https://www.notateslaapp.com/news/3885/tesla-expands-unsupervised-robotaxi-geofence-in-austin,"Approximated unsupervised expansion boundary based on MoPac, US-183, and SH-71."
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diff --git a/geometries/tesla_austin_expansion_20260331.geojson b/geometries/tesla_austin_expansion_20260331.geojson
new file mode 100644
index 0000000..4b4eebb
--- /dev/null
+++ b/geometries/tesla_austin_expansion_20260331.geojson
@@ -0,0 +1 @@
+{"type":"FeatureCollection","features":[{"type":"Feature","properties":{"company":"Tesla","city":"Austin","event_type":"geometry_updated","date":"2026-03-31","notes":"Approximated unsupervised expansion boundary based on MoPac, US-183, and SH-71."},"geometry":{"type":"Polygon","coordinates":[[[-97.809,30.232],[-97.74,30.39],[-97.69,30.34],[-97.66,30.21],[-97.809,30.232]]]}}]}
\ No newline at end of file