China is at the forefront of implementing pronounced decarbonisation practices to cut transportation emissions to fulfil its nationally determined contribution. The transport sector, the second largest emitting sector, accounts for 18.7% of the total greenhouse gas emissions in Hong Kong. Without ambitious decarbonisation efforts, transportation emissions and threat of climate change will not reduce significantly.Transportation system in Hong Kong differs from China in many facets, such as infrastructure, pollution standard, motor vehicle type and regulation. To reduce transportation emissions in the Guangdong-Hong Kong-Macao Greater Bay Area (GBA) over time, the region must emulate effective coordination and integration of transport policies for transformative changes.Each transport mode in Hong Kong presents opportunities for interagency collaborations and case-to-case financial incentives that hone determination within the public sector to adopt new energy vehicles. However, more could be done to enhance the intensity and rate of transport decarbonisation.The adoption of battery electric vehicles has widely proliferated as a prominent decarbonisation approach for transportation in Hong Kong. Under the assumption that the government and transport sector implement decarbonisation yearly to achieve said targets, findings reveal that medium goods vehicles would be the second largest roadside emissions source midway from net-zero by 2050.All stakeholders must work under one roof to implement ambitious transition pathways to achieve zero carbon transport emissions by 2050. Given the unique challenges in Hong Kong's transportation systems, the successful development of a prototype not only addresses local impediments but also establishes a valuable reference for other nations facing similar issues.