CoolRouting, Heat-Aware Route Planning for the Dutch Cycling Network

By Aron Muijen

Abstract
In recent years, the world has experienced an increase in global temperatures, which is due to climate change. The rise of global temperatures has led to an increase in extreme heat events, like heat waves, particularly affecting urban areas like the Netherlands. In densely populated regions, these heatwaves require solutions to protect people from the discomfort and risks associated with extreme heat.

In response to this challenge, recreational cycling can be a potential solution, offering people the opportunity to escape the heat by cycling. Luckily, The Netherlands has a very large cycle network, called the Dutch Cycle Network. However, even this extensive cycling network may not be immune to the challenges of climate change. As global temperatures rise, cyclists may encounter uncomfortable and dangerous conditions on certain parts of this network.
Therefore, this research focuses on identifying alternative, cooler routes within the Dutch Cycling Network. During the research, the Dutch Physiological Equivalent Temperature (PET) map was used to determine thermal comfort levels along the Dutch Cycle Network.

Out of 16,157 segments analysed, 224 of them had temperatures of more than 70% above 41 °C, which accounts for around 1.3% of the network. Then, an algorithm was developed to calculate alternative routes for these very hot segments. The CoolRouting algorithm generated routes that offer a more comfortable cycling experience, even if they may have slightly longer distances.
It can be stated that it is possible to find cooler routes for overheated segments within the Dutch Cycle Network. This research identified alternative routes that contribute to a more comfortable cycling experience during extreme hot weather. This research may provide valuable insights for urban planners and cyclists as they seek to adapt the Dutch Cycle Network to a changing climate, ensuring cycling remains a safe and enjoyable mode of transportation in The Netherlands.