En-route chart - Wikipedia

Instrument Flight Rules (IFR) Enroute Low Altitude Charts

File:IFR high altitude en route chart - Brasilia - Wikipedia

10 Types Of IFR Routes Published On Enroute Charts

File:Planes trains automobiles route map.gif - Wikipedia

Route (gridiron football) - Wikipedia

File:MRT Line 6 Route Map (en).svg - Wikipedia

Instrument Flight Rules (IFR) Enroute High Altitude Charts

Instrument Airplane - Enroute Charts

File:Route Map of Zhengzhou Metro Line 6.png - Wikipedia