Cellint reveals secrets of anonymous monitoring
Original article in ITS International - Monday 4 June 2007
Cellint Traffic Solutions (Booth 858 at ITS America's 2007 Annual Meeting which opens today in Palm Springs, California) is claiming to offer the only anonymous, cellular-based traffic monitoring system which is absolutely proven to provide slowdown detection times similar to those possible with more conventional road sensors.
The secret, says CEO Ofer Avni, lies in the use of ground truth referencing; road networks are pre-mapped, allowing much more accurate positioning of vehicles.
“Other solutions, by contrast, use theoretical calculation of vehicle locations and rely on triangulation using cell size location. There is a two orders of magnitude difference in accuracy; that’s the difference between detecting slowdowns within a few minutes using Cellint’s system and up to 50 minutes using others’.”
Development started in 2001, with a first product emerging in 2005, and the company has worldwide patents. Empirical development has been the key, says Avni.
There are projects using Cellint’s system in Sweden, The Netherlands, Israel and the US.
In Israel, a controlled pilot on HW1 demonstrated an average latency of just one minute in detecting slowdowns and an average error of location speed detection of less than 5kph (3mph), equating to segments of 300m (330 yards).
In the US, Cellint’s system has been used in Kansas City and Atlanta. The latter is not a pilot but a construction project – Cellint made its bid to replace conventional sensors for the duration of the build, supplying data on both main highways and arterials.
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