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1 IntroductionrnSmartphone sensing has emerged as an active area of interestfor researchers, as these are increasingly being used in smarttransportation services.This paper focuses on a smartphonebased vehicle monitoring system, viz.transportation mode de-tection.Detection of the transportation mode of a commuter isusually carried out through a combination of motion sensorssuch as an accelerometer and position sensors such as GPS [1].In the recent years, few researchers have presented the usage ofsingle smartphone sensors like accelerometer [2] that consumeless energy for detecting the transportation modes.