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===Technology=== All Sound Transit buses and trains are equipped with [[GPS tracking unit]]s to monitor their positions. The information is publicly available through an [[open data]] system and published under the [[GTFS]] standard used by navigation programs and apps.<ref>{{cite news |last1=Desmond |first1=Kevin |last2=Harbour |first2=Mike |date=February 25, 2015 |title=Metro, Sound Transit: a vision of data access, customer information |url=https://www.soundtransit.org/blog/platform/metro-sound-transit-vision-data-access-customer-information |work=The Platform |publisher=Sound Transit |accessdate=December 18, 2024}}</ref> The backend servers for the OneBusAway app, originally developed by a [[University of Washington]] student in 2008, were acquired by Sound Transit in 2013. The app continues to be maintained by volunteers.<ref>{{cite news |last=Bush |first=Evan |date=October 26, 2015 |title=Seattle-area traffic apps hungry for your data to make commute easier |url=https://www.seattletimes.com/seattle-news/transportation/seattle-area-traffic-apps-hungry-for-your-data-to-make-commute-easier/ |work=The Seattle Times |accessdate=December 18, 2024}}</ref> In 2016, a phased rollout of [[cellular network|cellular service]] in the Link light rail tunnels began.<ref>{{cite news |last=Lindblom |first=Mike |date=August 24, 2016 |title=Mixed blessing: Cellphones to start working in light-rail tunnels |url=https://www.seattletimes.com/seattle-news/transportation/seattle-transit-tunnels-will-finally-get-cellphone-signals/ |work=The Seattle Times |accessdate=December 25, 2024}}</ref> Since 2024, Sound Transit has offered 3D maps of select 1{{nbsp}}Line stations for accessible wayfinding through the GoodMaps app. The maps were developed through [[LiDAR]] scans and include real-time directions through the use of a phone camera.<ref>{{cite news |last=Freeman |first=Caitlyn |date=March 4, 2024 |title=Need help getting around Seattle light rail stations? This app could be useful |url=https://www.seattletimes.com/seattle-news/transportation/need-help-getting-around-seattle-light-rail-stations-this-app-could-help/ |work=The Seattle Times |accessdate=December 18, 2024}}</ref>
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