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- W193532527 abstract "This paper focuses on the development of a portable roadside sensor system for measurement of traffic flow rate, vehicle speeds and vehicle classification. The sensor system consists of wireless anisotropic magnetic devices which do not require to be embedded in the roadway – The devices are placed next to the roadway and measure traffic in the immediately adjacent lane. The vehicle detection algorithm is based on thresholds and speed measurement is based on calculation of cross-correlation between longitudinally spaced sensors. Fast computation of cross-correlation is enabled by using frequency domain signal processing techniques. The calculation of vehicle length follows from using a combination of vehicle speed and vehicle occupancy measurements. Rejection of data from vehicles in non-adjacent lanes is done by using model based position analysis of the magnetic field of vehicles. Data is presented from a large number of vehicles on a regular busy urban road in the Twin Cities in Minnesota. Separately, a high accuracy differential global positioning system (GPS) system is used to measure vehicle reference speeds to evaluate the accuracy of the speed measurement from the new sensor system. The speed measurement accuracy is shown to be of the order of 2%. The accuracy in vehicle detection using all of the collected urban road data is 100%." @default.
- W193532527 created "2016-06-24" @default.
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- W193532527 date "2013-01-01" @default.
- W193532527 modified "2023-09-28" @default.
- W193532527 title "Portable Roadside Sensors for Vehicle Counting and Speed Measurement" @default.
- W193532527 hasPublicationYear "2013" @default.
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