What is the speed restriction in Class B airspace below 10,000 feet MSL?

In Class B airspace, which encompasses major airports and their surrounding areas, the speed restriction below 10,000 feet MSL is set at 250 knots indicated airspeed (KIAS). This limitation is established to maintain a safe operating environment, ensuring that aircraft can manage the density of traffic typical in these busy airspaces.

The 250 KIAS speed limit below 10,000 feet MSL helps mitigate the potential for turbulence and wake turbulence-related incidents, especially in congested airspace where aircraft are maneuvering for takeoff and landing. Air traffic control (ATC) is able to maintain more orderly traffic flows and reduces the risk associated with high-speed aircraft operating in close proximity.

In contrast, while other speeds may apply in different classes of airspace or above certain altitudes, the specific 250 KIAS restriction in Class B airspace is particularly focused on maintaining safety and effectiveness in managing traffic around major airports.