Aviation Dictionary

Preferred IFR routes

Routes established in the major terminal and en route environments to increase system efficiency and capacity. IFR clearances are issued based on these routes, listed in the Chart Supplement U.S. except when severe weat…

Dictionary Term

Preferred IFR routes

Definition

Routes established in the major terminal and en route environments to increase system efficiency and capacity. IFR clearances are issued based on these routes, listed in the Chart Supplement U.S. except when severe weather avoidance procedures or oth

References

Instrument Procedures Handbook · Federal Aviation Administration · 2017