Final answer:
AVs have been difficult to build and roll out due to the complexity of the technology, regulatory and legal challenges, and infrastructure requirements.
Step-by-step explanation:
There have been optimistic predictions for the rollout of autonomous vehicles (AVs), but they have often been proven wrong. The difficulty in building and rolling out AVs can be attributed to various factors. One major challenge is the complexity of the technology involved. AVs require advanced sensors, artificial intelligence, and complex algorithms to navigate and make decisions in real-world scenarios.
Another challenge is the regulatory and legal framework around AVs. Governments and policymakers need to establish clear guidelines and regulations to ensure the safety and reliability of AVs. Additionally, there are ethical considerations related to AVs, such as determining how they should prioritize the safety of passengers and pedestrians in different scenarios.
Moreover, the infrastructure required to support AVs, such as road infrastructure and communication systems, also poses challenges. AVs need to be able to communicate with other vehicles and infrastructure to ensure efficient and safe transportation.