Traffic volume data Volume data across Dublin City, from DCC's SCATS system, in csv format. ''The volume data is aggregated over 5 minute intervals for each approach into an instrumented intersection. There are separate files for each region (CCITY, SCITY, NCITY, WCITY1) and for each day. For each day two files are supplied: ''.gps has the following columns: 'streetSegId: a unique identifier for a street segment ID 'armNumber: an ID for the arm on a street segment 'armAngle: bearing of the arm 'lato: latitude in WGS84 20 meters into the arm 'longo: longitude in WGS84 20 meters into the arm 'latd: latitude in WGS84 of the centroid of the intersection 'longd: longitude in WGS84 of the centroid of the intersection ''.dis has the following columns 'streetSegId: identifies the street segment from the corresponding .gps file 'upperTime: timestamp of the 5 minute interval 'armNumber: identifies the arm of the street segment from the corresponding .gps file 'aggerateCount: aggregated volume count on that arm 'flow: flow ratio calculated as the volume divided by the highest volume that 'has been measured in a sliding window of a week. ''Note that the flow ratio requires some burn in time of a week from the start of the recording period.