Victor airways have minimum (and possibly maximum) altitudes for IFR operations established.
[4][5][6] Victor airways are depicted as black solid lines on IFR Low-Altitude Enroute charts and as thick faded blue lines on VFR Terminal and Sectional Area charts.
They are identified by a number, similar to an interstate highway (for example, a pilot could say that he/she is "flying Victor Eight").
Low-level controlled fixed RNAV routes have dimensions of 4 NM of primary obstacle protection area, plus 2 NM of secondary obstacle protection area on each side of the centreline.
RNAV T-route airspace and protection areas do not splay with distance from the waypoint.