A bus that speaks sign language? Meet Olli.

Imagine: a self-driving shuttle bus visually recognizes disabled passengers as it picks them up, activating a ramp so they can board. It guides visually impaired passengers to empty seats. It understands and speaks sign language, and even reminds people if they leave a bag under a seat.

https://www.ibm.com/blogs/industries/ollie-ai-and-iot-autonomous-bus/