land was designated in the early 1960s by the then ministry of works for a motorway corridor from the sh1/sh87 interchange southwards through east taieri towards allanton. this would have re-aligned sh1 along this route and have extended the motorway southwards for several kilometres beyond its present terminus. a stretch of sh1 was realigned in this area during the 1970s, moved westward to avoid the edge of the coastal range of hills, and the junction with sh86 at allanton was redesigned, but no further work towards a potential motorway extension was carried out. transit new zealand did not seek to renew the designation for this road in 2007 , meaning that this project is now unlikely to proceed.