Traffic data wheel (infrared detectors) Hamburg

General information: The data set includes traffic data from all locations in Hamburg where cycling is recorded by means of infrared detectors on 24 hours a day and all the days of the year. The data set contains in real time the traffic strengths of individual counting fields as well as from several counting fields aggregated counting points. The schematic structure of data collection and data aggregation is described in a separate document, which can be found in the references. The data of the counting fields are provided in 5 and 15 minutes as well as at daily intervals. The data of the counting points are available aggregated in 15- and 60-minute intervals as well as in daily and weekly values. The data of the counting points are also visualised in the corresponding geoportals of the FHH, e.g. Geo-Online and Traffic Portal. In addition to real-time data, historical data are also available to the following extent: Counting fields: all data for the previous seven days at 5 and 15 minute intervals, all data for the previous month at hourly intervals, all data for the current and the previous year at daily intervals. Counting points: all data for the previous seven days at 15-minute intervals, all data for the previous month at hourly intervals, all data for the current and the previous year at daily intervals, all data since the beginning of collection at weekly intervals. Further information on the technical implementation of the data provision can be found in the metadata of the associated data services. Information about the technology: The infrared detectors are usually installed on lighting poles, but in some cases also on other masts. The detectors record and count traffic via the heat radiation of the individual traffic participants. Since only infrared images are evaluated, data protection is guaranteed at all times. Notes on data quality: The data is transferred in real time to FHH’s Urban Data Platform. Thus, these are available in a timely manner for all users and interested parties. Due to the real-time component, however, different framework conditions must be observed: The data are not fully quality assured at the time of the first publication. Unusual deviations from the expected data and data gaps are automatically detected by the system, but cannot currently be corrected in real time. Gaps that occur, e.g. due to a demolition of data transmission, can still be subsequently returned. Under certain circumstances and in the event of prolonged failures, changes in the historical data can therefore be made after a few days. The data published here are not officially verified data of the FHH. As with any traffic count, whether automated or manual, there are certain tolerances in the measurement accuracy. Claim to the system used here are accuracy for the counting fields of ± 10 % for the detection of cycling traffic on sidewalks, cycle paths and cycle lanes and ± 20 % for the detection of cycling traffic in mixed traffic with motor vehicles. Since counting points are formed from a combination of different counting fields, the deviation can be up to ± 20 %. In principle, it should be noted that the system, including the recording technology, was still under development in 2020. The historical data from 2020 can therefore be used to assess the fundamental development of traffic, but some have greater inaccuracies and jumps in data quality.