Bulut, M. F.Demirbas, M.Ferhatosmanoglu, H.2016-02-082016-02-0820151536-1233http://hdl.handle.net/11693/20826This article describes LineKing, a crowdsensing system for monitoring and forecasting coffee shop line wait times. LineKing consists of a smartphone component that provides automatic and accurate wait-time detection, and a cloud backend that uses the collected data to provide accurate wait-time estimation. LineKing is used on a daily basis by hundreds of users to monitor the wait-times of a coffee shop in the University at Buffalo, SUNY. The novel wait-time estimation algorithms of LineKing deployed at the cloud backend provide median absolute errors of less than 3 minutes.EnglishCrowdsensingSmartphone applicationsWait-time estimationSignal encodingAbsolute errorCoffee shopsCrowdsensingTime detectionTime estimationTime monitoringWait timeSmartphonesArticle10.1109/TMC.2014.23840321558-0660