coverage area of Center radar, and; therefore, off-route  transitions into the approach environment may require  that the aircraft be flown at a higher altitude than would  be required for an on-route transition. In the Durango  example, an airplane approaching from the northeast on  a direct route to the Durango VOR may be restricted to  a minimum IFR altitude (MIA) of 17,000 feet MSL due to  unavailability of Center radar coverage in that area at lower  altitudes. An arrival on V95 from the northeast would be  able to descend to a minimum en route altitude (MEA) of  12,000 feet, allowing a shallower transition to the approach  Considering the fact that most modern commercial and  corporate aircraft are capable of direct, point-to-point flight,  it is increasingly important for pilots to understand the  limitations of ARTCC capabilities with regard to minimum  altitudes. There are many airports that are below the  consider the Durango, Colorado, ILS DME RWY 2 and low  altitude en route chart excerpt shown in Figure 4-7.  High or Lack of Minimum Vectoring Altitudes  (MVAs)  Figure 4-7. Durango approach and low altitude en route excerpt.  4-14 