Design of a wireless sensor network platform for detecting rare, random, and ephemeral events
IPSN '05 Proceedings of the 4th international symposium on Information processing in sensor networks
CarTel: a distributed mobile sensor computing system
Proceedings of the 4th international conference on Embedded networked sensor systems
Extracting Places and Activities from GPS Traces Using Hierarchical Conditional Random Fields
International Journal of Robotics Research
Proceedings of the 6th international conference on Mobile systems, applications, and services
The Mobile Sensing Platform: An Embedded Activity Recognition System
IEEE Pervasive Computing
BALANCE: towards a usable pervasive wellness application with accurate activity inference
Proceedings of the 10th workshop on Mobile Computing Systems and Applications
A framework of energy efficient mobile sensing for automatic user state recognition
Proceedings of the 7th international conference on Mobile systems, applications, and services
EnTracked: energy-efficient robust position tracking for mobile devices
Proceedings of the 7th international conference on Mobile systems, applications, and services
Sensor selection for energy-efficient ambulatory medical monitoring
Proceedings of the 7th international conference on Mobile systems, applications, and services
Activity recognition from accelerometer data
IAAI'05 Proceedings of the 17th conference on Innovative applications of artificial intelligence - Volume 3
A hybrid discriminative/generative approach for modeling human activities
IJCAI'05 Proceedings of the 19th international joint conference on Artificial intelligence
VTrack: accurate, energy-aware road traffic delay estimation using mobile phones
Proceedings of the 7th ACM Conference on Embedded Networked Sensor Systems
Mercury: a wearable sensor network platform for high-fidelity motion analysis
Proceedings of the 7th ACM Conference on Embedded Networked Sensor Systems
Understanding transportation modes based on GPS data for web applications
ACM Transactions on the Web (TWEB)
Using mobile phones to determine transportation modes
ACM Transactions on Sensor Networks (TOSN)
Towards mobile phone localization without war-driving
INFOCOM'10 Proceedings of the 29th conference on Information communications
A practical approach to recognizing physical activities
PERVASIVE'06 Proceedings of the 4th international conference on Pervasive Computing
Code in the air: simplifying sensing on smartphones
Proceedings of the 8th ACM Conference on Embedded Networked Sensor Systems
Accurate, low-energy trajectory mapping for mobile devices
Proceedings of the 8th USENIX conference on Networked systems design and implementation
Improving wireless network performance using sensor hints
Proceedings of the 8th USENIX conference on Networked systems design and implementation
Field trial of Tiramisu: crowd-sourcing bus arrival times to spur co-design
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Participatory sensing for community building
CHI '11 Extended Abstracts on Human Factors in Computing Systems
Review: From wireless sensor networks towards cyber physical systems
Pervasive and Mobile Computing
Seeker-assisted human navigation using smart phones
Proceedings of 1st international symposium on From digital footprints to social and community intelligence
A survey on privacy in mobile participatory sensing applications
Journal of Systems and Software
EasyTracker: automatic transit tracking, mapping, and arrival time prediction using smartphones
Proceedings of the 9th ACM Conference on Embedded Networked Sensor Systems
Demo: Tracking transit with EasyTracker
Proceedings of the 9th ACM Conference on Embedded Networked Sensor Systems
Demo: Automatically generating interesting events with LifeJoin
Proceedings of the 9th ACM Conference on Embedded Networked Sensor Systems
Trip analyzer through smartphone apps
Proceedings of the 19th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems
Code in the air: simplifying sensing and coordination tasks on smartphones
Proceedings of the Twelfth Workshop on Mobile Computing Systems & Applications
TapLogger: inferring user inputs on smartphone touchscreens using on-board motion sensors
Proceedings of the fifth ACM conference on Security and Privacy in Wireless and Mobile Networks
How long to wait?: predicting bus arrival time with mobile phone based participatory sensing
Proceedings of the 10th international conference on Mobile systems, applications, and services
Human participatory sensing in fixed route bus information system
Nets4Cars/Nets4Trains'12 Proceedings of the 4th international conference on Communication Technologies for Vehicles
Deanonymizing mobility traces: using social network as a side-channel
Proceedings of the 2012 ACM conference on Computer and communications security
MusicalHeart: a hearty way of listening to music
Proceedings of the 10th ACM Conference on Embedded Network Sensor Systems
IODetector: a generic service for indoor outdoor detection
Proceedings of the 10th ACM Conference on Embedded Network Sensor Systems
Acc: generic on-demand accelerations for neighbor discovery in mobile applications
Proceedings of the 10th ACM Conference on Embedded Network Sensor Systems
Tracking unmodified smartphones using wi-fi monitors
Proceedings of the 10th ACM Conference on Embedded Network Sensor Systems
Low cost positioning by matching altitude readings with crowd-sourced route data
Proceedings of the 10th International Conference on Advances in Mobile Computing & Multimedia
Sensing vehicle dynamics for determining driver phone use
Proceeding of the 11th annual international conference on Mobile systems, applications, and services
ParkSense: a smartphone based sensing system for on-street parking
Proceedings of the 19th annual international conference on Mobile computing & networking
Tracking daily activity using smart phones
Proceedings of the 6th International Conference on Rehabilitation Engineering & Assistive Technology
Motivating contribution in a participatory sensing system via quid-pro-quo
Proceedings of the 17th ACM conference on Computer supported cooperative work & social computing
MoveSafe: a framework for transportation mode-based targeted alerting in disaster response
Proceedings of the Second ACM SIGSPATIAL International Workshop on Crowdsourced and Volunteered Geographic Information
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Real-time transit tracking is gaining popularity as a means for transit agencies to improve the rider experience. However, many transit agencies lack either the funding or initiative to provide such tracking services. In this paper, we describe a crowd-sourced alternative to official transit tracking, which we call cooperative transit tracking. Participating users install an application on their smart-phone. With the help of built-in sensors, such as GPS, WiFi, and accelerometer, the application automatically detects when the user is riding in a transit vehicle. On these occasions (and only these), it sends periodic, anonymized, location updates to a central tracking server. Our technical contributions include (a) an accelerometer-based activity classification algorithm for determining whether or not the user is riding in a vehicle, (b) a memory and time-efficient route matching algorithm for determining whether the user is in a bus vs. another vehicle, (c) a method for tracking underground vehicles, and an evaluation of the above on real-world data. By simulating the Chicago transit network, we find that the proposed system would shorten expected wait times by 2 minutes with only 5% of transit riders using the system. At a 20% penetration level, the mean wait time is reduced from 9 to 3 minutes.