Definition
Altitude and/or speed requirements that a pilot must meet at a specified fix along a route, arrival, or departure procedure. A crossing restriction is published on charts (or assigned by ATC) and tells the pilot to be at, at or above, or at or below a stated altitude — and sometimes at or below a stated airspeed — when crossing that fix. In FMS-equipped aircraft, these restrictions are coded into the procedure and used by the flight management system to calculate the descent or climb path.
Plain English
A rule that tells you what altitude (and sometimes what speed) you must be at when you fly over a specific point on your route.
Context Anchor
Seen in instrument procedures, air traffic control instructions, and flight management system descent planning.
Derivation
Crossing comes from the idea of passing across a line or point. In aviation, it means passing a named point along the route. Restriction means a limit or required condition, so crossing restrictions are conditions that apply at the moment the aircraft passes that point.
Why Pilots Care
They guarantee terrain clearance, traffic separation, and procedure compliance; failing to meet them can result in a deviation or unsafe flight path.
Grounding Statement
A crossing restriction is a required condition that must be true as the aircraft passes a specific point.
Intuition Check
Do not read crossing restrictions as runway-crossing instructions. Here, crossing means passing a named point in flight, and restrictions means the altitude, speed, or time limits tied to that point.
Example Sentence 1
The arrival had a crossing restriction at GIPPER of at or above 11,000 feet, so the crew started the descent early to make the altitude comfortably.
Example Sentence 2
We adjusted speed early to comply with the 250-knot crossing restriction at the next fix.