This proposed high noise corridor, where the jet Xight path tracks are most heavily concentrated, runs in a north- south direction between designated noise abatement areas (Fig. 2). The land developers argue that the location of the proposed development is well within the Australian Stan- dard (AS2021) for land use planning, even for the airport’s projections for air traYc in the year 2050. That is, the pro- posed development does not lie within the so-called 20 ANEF noise contour, a measure designed for land use planning to stop airports being “built out” by noise sensi- tive land uses (Department of Transport and Regional Ser- vices, 2000, p. 1; The Village Building Co., 2003). However, experience in recent years demonstrates that the aircraft noise problem is not conWned to areas inside the noise con- tours. In fact most complaints about aircraft noise at Aus- tralian airports come from people who live outside the published 20 ANEF contours (Department of Transport and Regional Services, 2000, p. 2). For this reason, Can- berra airport management argues that the ANEF system is