Inspec keywords: traffic information systems; road traffic; real-time systems; sampling methods; information filtering

Other keywords: communication delays; data-filtering procedure; travel speed measuring accuracy; data validity window; urban traffic information system; vehicle trajectories; percent errors; sampling interval; road traffic; link travel times; average roadway link travel speeds; standard deviation; mobile detector; real-time estimation; UTIS data

Subjects: Traffic engineering computing; Information retrieval techniques; Other topics in statistics