Energy-efficient surveillance system using wireless sensor networks
Proceedings of the 2nd international conference on Mobile systems, applications, and services
The Horus WLAN location determination system
Proceedings of the 3rd international conference on Mobile systems, applications, and services
Proceedings of the 4th international conference on Mobile systems, applications and services
Surface street traffic estimation
Proceedings of the 5th international conference on Mobile systems, applications and services
Understanding the limitations of transmit power control for indoor wlans
Proceedings of the 7th ACM SIGCOMM conference on Internet measurement
Delay-bounded routing in vehicular ad-hoc networks
Proceedings of the 9th ACM international symposium on Mobile ad hoc networking and computing
Brimon: a sensor network system for railway bridge monitoring
Proceedings of the 6th international conference on Mobile systems, applications, and services
Model-based monitoring for early warning flood detection
Proceedings of the 6th ACM conference on Embedded network sensor systems
Nericell: rich monitoring of road and traffic conditions using mobile smartphones
Proceedings of the 6th ACM conference on Embedded network sensor systems
Experimental Study of the Impact of WLAN Interference on IEEE 802.15.4 Body Area Networks
EWSN '09 Proceedings of the 6th European Conference on Wireless Sensor Networks
Air-dropped sensor network for real-time high-fidelity volcano monitoring
Proceedings of the 7th international conference on Mobile systems, applications, and services
VTrack: accurate, energy-aware road traffic delay estimation using mobile phones
Proceedings of the 7th ACM Conference on Embedded Networked Sensor Systems
Experiences with a high-fidelity wireless building energy auditing network
Proceedings of the 7th ACM Conference on Embedded Networked Sensor Systems
Proceedings of the 8th international conference on Mobile systems, applications, and services
Not all wireless sensor networks are created equal: A comparative study on tunnels
ACM Transactions on Sensor Networks (TOSN)
Indoor localization without the pain
Proceedings of the sixteenth annual international conference on Mobile computing and networking
Locating sensors in the wild: pursuit of ranging quality
Proceedings of the 8th ACM Conference on Embedded Networked Sensor Systems
Surviving wi-fi interference in low power ZigBee networks
Proceedings of the 8th ACM Conference on Embedded Networked Sensor Systems
Proceedings of the First ACM Symposium on Computing for Development
REALWSN'10 Proceedings of the 4th international conference on Real-world wireless sensor networks
REALWSN'10 Proceedings of the 4th international conference on Real-world wireless sensor networks
Real-time trip information service for a large taxi fleet
MobiSys '11 Proceedings of the 9th international conference on Mobile systems, applications, and services
SignalGuru: leveraging mobile phones for collaborative traffic signal schedule advisory
MobiSys '11 Proceedings of the 9th international conference on Mobile systems, applications, and services
Poster: Statistical learning strategies for RF-based indoor device-free passive localization
Proceedings of the 9th ACM Conference on Embedded Networked Sensor Systems
Road traffic congestion in the developing world
Proceedings of the 2nd ACM Symposium on Computing for Development
Efficient Data Propagation in Traffic-Monitoring Vehicular Networks
IEEE Transactions on Intelligent Transportation Systems
On the Effectiveness of an Opportunistic Traffic Management System for Vehicular Networks
IEEE Transactions on Intelligent Transportation Systems
T-Drive: Enhancing Driving Directions with Taxi Drivers' Intelligence
IEEE Transactions on Knowledge and Data Engineering
Information fusion based learning for frugal traffic state sensing
IJCAI'13 Proceedings of the Twenty-Third international joint conference on Artificial Intelligence
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Unprecedented rate of growth in the number of vehicles has resulted in acute road congestion problems worldwide. Better traffic flow management, based on enhanced traffic monitoring, is being tried by city authorities. In many developing countries, the situation is worse because of greater skew in growth of traffic vs the road infrastructure. Further, the existing traffic monitoring techniques perform poorly in the chaotic non-lane based traffic here. In this paper, we present Kyun Queue, a sensor network system for real time traffic queue monitoring. Compared to existing systems, it has several advantages: it (a) works in chaotic traffic, (b) does not interrupt traffic flow during its installation and maintenance and (c) incurs low cost. Our contributions in this paper are four-fold. (1) We propose a new mechanism to sense road occupancy based on variation in RF link characteristics, when line of sight between a transmitter-receiver pair is obstructed. (2) We design algorithms to classify traffic states into congested or free-flowing at time scales of 20 seconds with above 90% accuracy. (3) We design and implement the embedded platforms needed to do the sensing, computation and communication to form a network of sensors. This network can correlate the traffic state classification decisions of individual sensors, to detect multiple levels of traffic congestion or traffic queue length on a given stretch of road, in real time. (4) Deployment of our system on a Mumbai road, after careful consideration of issues like localization and interference, gives correct estimates of traffic queue lengths, validated against 9 hours of image-based ground truth. Our system can provide input to several traffic management applications like traffic light control, incident detection, and congestion monitoring.