Safe infrastructure, also for the elderly

The starting point of the project is the that the elderly should remain mobile as much as possible and that their (present) bicycle and car trips should be facilitated as much as possible. However, the traffic system is not designed as envisaged in traffic policy and the resulting specifications thereof in design requirements. This is not good for the safety of road users in general, and certainly not for that of older road users who benefit from a traffic system that takes into account their specific travel characteristics and the various physical and cognitive limitations that come with age.

The analysis will mainly consist of establishing route scores, complexity scores for intersections and conflict scores (using a microsimulation model). The scores will show the differences in safety between situations with many and with few elderly people in traffic.

Research questions

  1. In which parts of the road and bicycle path network do problems occur?
  2. To what extent road should authorities and designers have specific attention for this in policy and the design and maintenance of roads?


The requirements for the elderly that should be made from the traffic system are usually ordered according to the building blocks of the traffic system: network, routes, road sections/intersections. For road sections/ intersections specific requirements to benefit the elderly have been specified in previous projects in terms of dimensions and avoidability of objects. At the network level, the requirements are usually fairly general (in particular mesh size network, facilities level) and are not easy to focus specifically on the elderly; in addition these types of requirements can mostly only be realized in newly constructed networks. On route level the requirements are more specific and feasible in existing situations, such as crossing possibilities and continuity of cycling facilities. The project therefore focuses on formulating a package of requirements for routes that will benefit older cyclists and drivers. These requirements offer recommendations and handles to establish the quality of routes, to improve existing routes, and to bring alternative routes to the attention of users. Several methods will be used in the study:

  • Questionnaires
  • Route inspections
  • Desk research (Cyclomedia, basic map ArcGIS)
  • Bikeprint (NHTV, governments)
  • Modelling (microsimulation using AIMSUN, S-Paramics, VISSIM)

The project is a sequel to project S 16.07-a.

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Project nr.



Start date: 01 Jan 2017
End date: 31 Dec 2017