Resistant tree species for expressway and highway plantation

The expressways and highways in Hong Kong serve as essential transportation pillars, connecting urban, suburban, and rural areas. However, the subtropical climate in Hong Kong brings intense rain and typhoons each year, which can cause trees to collapse and block the connectivity among the road networks. This not only affects transportation but also poses a safety risk to road users.

Therefore, we are going to identify suitable tree species for planting in different areas of Hong Kong based on their specific environmental conditions. Through careful selection and placement of resilient tree species, we can promote sustainable and resilient urban forestry, while also improving air quality, promoting biodiversity and minimising the potential changes for the traffic blockage from tree collapse.

Balancing factor for the density and capacity among roadside tree

The Development Bureau is currently working on ten tree management improvements. However, there are some areas that they have not yet considered, such as exploring a mathematical model to quantify the roadside tree density and capacity. They have only recently begun to investigate the suitability and sustainability rules for roadside tree planting in response to news reports. To address these gaps, Forestree plans to conduct research and develop a local balancing factor for computing roadside tree density and capacity.