Obstacles are believed to come from three aspects: capital availability, human resources, and regulation knowledge.
The lack of capital resources is an obvious one. Costs for the deployment of AVs can be millions of euros. Although expenses are mainly dependent on vehicle types and scale, project duration, specific use cases, operating scenarios, and deployment areas, it also needs to be considered that additional costs can come unexpectedly, from preparation (e.g., identification of use cases for different airport areas, feasibility study including cost-benefit analysis, infrastructure assessment, sourcing providers for vehicles and additional products and services, cost negotiation, etc.), from setup (e.g., delivery of vehicles, testing, and training, etc.), and finally from operation (e.g., vehicle operation, monitoring, and maintenance)
Secondly, some airports face a lack of human resources and experience such as technology experts, innovation project managers, communication experts on innovation, and experience to run, promote, and upscale autonomous driving projects. More tasks will emerge also along the process from preparation, setup to operation.
The last aspect is regarding regulation, which is viewed as the main bottleneck to the adoption of autonomous driving (McKinsey survey result).
Regulations vary significantly in different countries and evolve so rapidly that existing knowledge about it can become outdated overnight. For private sites such as airports, regulations are not as strict as those for public roads, they still must comply to different general regulatory procedures established by national transport authorities.