hub-and-spoke system
noun[C]
TRANSPORTukusatransportsystemin whichpassengerstravelfromsmallerairports,stations, etc. to onelargecentralairport,station, etc. to makelongertrips:
Themaindisadvantageto a hub-and-spokesystemis that anydisruptionat thehub, such asbadweather, cancreatedelays.