ENHANCING PRIVACY AND ACCURACY IN PROBE VEHICLE-BASED TRAFFIC MONITORING VIA VIRTUAL TRIP LINES
ENHANCING PRIVACY AND ACCURACY IN PROBE VEHICLE-BASED TRAFFIC MONITORING VIA VIRTUAL TRIP LINES
ABSTRACT :
Traffic monitoring using probe vehicles with GPS receivers promises significant improvements in cost, coverage, and accuracy over dedicated infrastructure systems. Current approaches, however, raise privacy concerns because they require participants to reveal their positions to an external traffic monitoring server. To address this challenge, we describe a system based on virtual trip lines and an associated cloaking technique, followed by another system design in which we relax the privacy requirements to maximize the accuracy of real-time traffic estimation. We introduce virtual trip lines which are geographic markers that indicate where vehicles should provide speed updates. These markers are placed to avoid specific privacy sensitive locations. They also allow aggregating and cloaking several location updates based on trip line identifiers, without knowing the actual geographic locations of these trip lines. Thus, they facilitate the design of a distributed architecture, in which no single entity has a complete knowledge of probe identities and fine-grained location information. We have implemented the system with GPS smart phone clients and conducted a controlled experiment with 100 phone-equipped drivers circling a highway segment, which was later extended into a year-long public
deployment.
EXISTING SYSTEM:
In the existing system traffic data collection mechanisms have relied on fixed sensor networks, including inductive loop detectors, wireless magnetometer sensors, and microwave radar sensors. These dedicated sensing systems are expensive to install and maintain, their deployment has been limited largely to highways. It is unable to provide information to arterial roads.
The data which are collected by sensors network are stored in centralized privacy server are hacked by unauthorized person. The system must be bootstrapped with other sources of information, since accurate estimates can only be achieved when sufficient users participate.
PROPOSED SYSTEM:
In the proposed system a novel traffic monitoring system design based on the concept of virtual trip lines (VTLs) and experimentally evaluates its feasibility. Virtual trip lines are geographic markers stored in the mobile phone client, which trigger a position and speed update when a probe vehicle trajectory intersects a trip line. Through privacy-aware placement of these trip lines, clients need not rely on a trustworthy server. The system is designed for GPS-enabled cell phones to enable rapid software deployment to a large and increasing number of programmable smart phones.
HARDWARE REQUIREMENTS:
Processor : Dualcore
RAM : 2 GB
Speed : 166 MHz
Resolution : 640 x 480 pixels
Hard Disk : 80 GB
Operating System : Platform independent
SOFTWARE REQUIREMENTS:
Web Technology : JSP And Servlet.
Backend : Mysql.
Operating System : Windows Xp.
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