* Speed itself is not something that travels. It's a measurement of how fast something is moving.
* If you're asking how fast *information* about speed can travel, that depends on the method:
* Light: Information about speed can travel at the speed of light, which is approximately 299,792,458 meters per second (186,282 miles per second).
* Sound: Sound travels much slower than light, and its speed depends on the medium it's traveling through. In air, sound travels at about 343 meters per second (767 mph).
* Radio waves: Radio waves travel at the speed of light.
So, the answer to your question depends on what you're asking about. Can you clarify?
