The Rainroad is a solution for multiple issues that are the result of our changing climate. More often we have to deal with extreme rainfall, but at the same time we will also have more hot summer days. The temperature in inner city areas can become 7 degrees higher than rural areas.This Rainroad is a reservoir that can easily be placed underneath the sidewalk or a parking lot. A number of these reservoirs forms extra water buffering capacity in the urban area. In the hot summer days the stored water can evaporate and this way lower the temperature.