Prior to the introduction of electronic payments on the network, paper tickets and passes were used by Portland-area transit agencies. The tickets needed to be validated at ticket validators on the Streetcar or at MAX and WES stations. They did not offer fare exchange or extension. Installation of Hop readers began in March 2015, and was completed by the end of 2016. A public beta began in February 2017. Hop debuted through a slow rollout at retail stores that began on July 5, 2017, and culminated in an official launch on July 17. The system cost $35.9 million to install and test at the time of its public release. TriMet ceased sales of its paper tickets at retail stores in October 2018 and from its customer service offices the following year. By December 2019, 80.7percent of TriMet fares were paid using the Hop Fastpass system; of those transactions, only 4percent used the open payments, while the rest used a card. An existing
mobile ticketing app, which launched in 2013, was also shut down in December 2019. ==Technology==