Please note: The algorithm descriptions in English have been automatically translated. Errors may have been introduced in this process. For the original descriptions, go to the Dutch version of the Algorithm Register.
Amsterdam Low-Speed Traffic Monitoring System
- Publication category
- Impactful algorithms
- Impact assessment
- DPIA
- Status
- In use
General information
Theme
Begin date
Contact information
Responsible use
Goal and impact
The purposes of processing personal data and applying calculation rules within the Amsterdam Slow Traffic Monitoring System are:
- To prevent and manage unsafe situations (safety);
- Ensuring good pedestrian accessibility to public facilities and smooth traffic flow in a wider area around busy locations (accessibility and traffic flow);
- A high-quality public space in which pedestrians feel welcome, safe and comfortable (quality and comfort).
Considerations
The use of cameras equipped with algorithms is the only way to achieve this objective effectively, as it allows pedestrian and cycle traffic across a large area to be monitored from a single location.
Human intervention
The algorithm indicates how busy a particular location is, and based on this: 1) an automated script decision for dynamic traffic management (DVM-exchange) can be generated, on a per-minute basis. DVM-exchange refers to the control of information and matrix displays regarding traffic congestion. 2) a decision be made, through human intervention, to implement traffic measures. In that case, the algorithm provides part of the information required for that decision. Regular validations are carried out to compare figures from the measurement systems with the actual numbers on the road.
Risk management
If the numbers detected by a sensor are underestimated or overestimated, this can lead to peaks or troughs in the figures in the database and on the dashboard. This may give the crowd manager a distorted picture of the current situation. The system supports decision-making during operations; this means that a visual check is always carried out on site before any measure (such as implementing one-way traffic) is implemented. Location data / Combining datasets: Where sensor counts are very low, and when combined with other datasets, it could theoretically be possible to track a passer-by’s route as they pass multiple sensors.
Legal basis
The Municipality of Amsterdam carries out monitoring of low-speed traffic in public spaces pursuant to Article 2 of the 1994 Road Traffic Act (Wvw 1994). The Municipality of Amsterdam is the road authority. In this role, it is responsible for ensuring safe and smooth traffic flow, as well as maintaining access to public facilities. This also applies to non-motorised traffic and pedestrian flows. The municipality processes this data in order to carry out a task in the public interest, namely to promote safe, accessible and comfortable public spaces.
Impact assessment
Operations
Data
The traffic count data from the Amsterdam Slow Traffic Monitoring System (LVMA) provides information on the number of passers-by in public spaces. Slow traffic mainly refers to pedestrians and cyclists. This information is used strategically, tactically and operationally to support crowd management. Analyses are also carried out to gain an insight into how crowd levels develop over time. At the sensor, images are converted into count data. - Numbers per direction - Speed - Density in the measurement section - Mode of transport The various calculation rules applied to the near-real-time count data then enable this data processing, including through: - Storage - Aggregation (summarising over a longer period) - Enrichment and calculations based on the count data - Short-term forecast - Threshold values - Dashboard - Making count data publicly available Short-term forecast Aggregated count data from the past 8 weeks For the same quarter of an hour each day -> what has been the increase or decrease in the number of passers-by at the same time? Trend for the current day The Municipality of Amsterdam does not store any personal data in the LVMA. All LVMA sensors are listed at: https://maps.amsterdam.nl/lvma/ and in the City of Amsterdam’s Sensor Register: https://sensorenregister.amsterdam.nl The aggregated data is aggregated at hourly, daily and weekly levels and published as open data at https://data.amsterdam.nl/data/datasets/PnrmHN-YvSqjhw/langzaam-verkeer-monitoringsysteem-amsterdam-lvma/
External provider
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