Issues related to mixed traffic

Over the past years, TrafficQuest has explored the impacts on traffic flow and traffic management of the introduction of automated vehicles on our roads. In this area, much research is still needed and TrafficQuest has identified research topics and questions that deserve attention in the coming years. One memo describes the regulatory and strategic issues of automated driving for road authorities and planners. The other memo indicates how the possible impacts of mixed traffic (consisting of automated and manually driven vehicles) can be described and quantified, using measurements and simulations.

Evaluation of C-ITS and Automated Driving

For the Round Table 'Effects' (organised by DITCM and Connecting Mobility) TrafficQuest has contributed to a new way of looking at the evaluation of C-ITS and Automated Driving. It is a cyclic view on evaluation that has the advantage that not only the impacts of different systems and services are determined, but that these results are also put into perspective. This can be done using the results of other experiments or of experiments under different circumstances (meta-analysis), but also by relating the results to policy goals and drawing generic conclusions about the impact on a national level or with different penetration rates (scaling). Eventually, these steps lead to new questions and hypotheses, which can be tested in new experiments. An extensive description of the evaluation circle is given in a report 'Evaluation of C-ITS and Automated Driving'.

C-ITS and traffic safety

Several cooperative ITS services (C-ITS) are currently being tested in the Netherlands. With these in-car systems and services road users are informed, warned for certain situations on the road and advised to change their driving behaviour. It is expected that a lot of these services will be implemented in the coming years, not only on the motorway network but also in cities. Due to the experimental character of these services and their number and diversity, it is difficult to draw general conclusions about the (potential) effects. A lot about the impacts is still unclear. Rijkwaterstaat has asked TrafficQuest to do a quick scan on the effects of C-ITS, especially on road safety. The available literature was read and analysed and the numbers that were mentioned in these studies were summarised. The results of this quick scan are described in this memo (in Dutch).

Analysis of near future bottlenecks

overzicht_knelpunten_2016Rijkswaterstaat has asked TrafficQuest the question which future bottlenecks Rijkswaterstaat can expect in their road network the coming years (period 2016-2018) and what traffic management measures are needed to deal with these new bottlenecks. To investigate this an inquiry was held with the different traffic control centres to locate these bottlenecks. Their judgement and expert knowledge was used for this. Eventually, 14 bottleneck locations were selected and this selection was based on the existence of a clear road section which caused the congestion and the availability of data. After the selection the Data and Information Management section of Rijkswaterstaat generated information for these roadsections and accompanying routes. The data was analysed by TrafficQuest and reported in a memo (only in Dutch).

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