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.

Network analysis Road safety

The Network Traffic Safety Analysis identifies traffic safety risks on (parallel) roads, bicycle paths and intersections managed by the province of Utrecht. Accident data and risk indicators (infrastructural and use/behaviour) are used.

Last change on 25th of August 2025, at 8:46 (CET) | Publication Standard 1.0
Publication category
Other algorithms
Impact assessment
Field not filled in.
Status
In use

General information

Theme

Traffic

Begin date

2023

Contact information

algoritmes@provincie-utrecht.nl

Responsible use

Goal and impact

The application aims to contribute to the improvement of road safety in the province of Utrecht. The algorithm is a tool to gain more, better and faster insights into traffic safety based on various indicators. The results of the application are used to advise traffic experts on (policy) choices that reduce the risk of traffic accidents. High-risk locations can be detected, prioritised and monitored. Based on this, various measures can be taken, both infrastructure improvements and behavioural interventions.

Considerations

The model combines diverse road safety data, both accident and risk indicators (road characteristics, behaviour). Previously, this data was mainly scattered. This application combines it conveniently and tests the data against relevant guidelines and frameworks. Based on this, targeted measures can be taken and questions can be answered. The downside is that the results of the model have to be interpreted properly by users. Not all existing road safety risks can be expressed in data/risk indicators, and data may contain errors.

Human intervention

The algorithm is an analytical tool. The outcomes are advisory and thus interpreted and verified by humans. Model outcomes are never adopted 1-to-1. So there is no automated decision-making.

Risk management

Nationally established datasets are used as much as possible. Data quality is checked periodically and, where possible, updated annually. Detailed documentation is available on the structure, content and use of the application. The results are always reviewed by a traffic expert before use. Finally, no personal data are processed or displayed.

Legal basis

The Road Traffic Act (article a4, c),

Road Infrastructure Safety Decree (section 3, et seq.)

Links to legal bases

  • Road Traffic Act 1994,: https://wetten.overheid.nl/BWBR0006622/2024-06-19/#HoofdstukaIA_Artikela4c.
  • Road Infrastructure Safety Decree: https://wetten.overheid.nl/BWBR0048193/2023-06-01

Elaboration on impact assessments

No personal data and/or privacy-sensitive information will be used

Operations

Data

Kadaster, BGT, BRON, BRUTUS (province of Utrecht), Cyclomedia, DUO, NDW, NWB, OpenOV, OSM, STRAVEM (province of Utrecht), VVN, WKD, TomTom, Groenestein (province of Utrecht)

Technical design

A risk score is calculated for each road section (road or cycle path) based on the selected road safety risks. The risks are divided into three networks: motorised traffic, mixed traffic and cycle tracks. Each of the networks has a specific set of risks, which was established based on working sessions with experts. For each risk and road characteristic, a traffic analysis was prepared. This justification is related to current design guidelines and determines at which value a certain score is reached. Here, each road section is given a risk score on a scale of 0 to 1.

External provider

Arcadis in combiation with DOKdata

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