This sensor records counts across three 'count-lines' which enables the sensor to provide more accurate counts at different points across the road and is particularly useful for picking up pedestrians.

Sensors with multiple count lines split the count-line into: the centre line, a left-hand side line (LHS) and a right-hand side line (RHS). For sensors containing more than one countline, the data provided is disaggreageted by the individual countlines. For sensor-level counts, simply aggregate the centre, LHS and RHS count-lines together.