How Adelaide’s north‑east is put together
The north‑eastern suburbs sit on a wedge of the Adelaide plain between the River Torrens and the foot of the Adelaide Hills. Two long arterials run out from the city along that wedge, North East Road and Lower North East Road, with Grand Junction Road crossing them east to west. Almost every residential street in the area feeds, eventually, into one of those three.
The suburbs themselves come in two ages, and they drive completely differently. The older ones were laid out in the 1950s and 60s as a wide, regular grid: Modbury, Holden Hill, Hope Valley. The newer ones were master‑planned from the 1980s around curved collector roads and roundabouts: Golden Grove, Wynn Vale, Greenwith. A learner who only ever drives one of those two patterns has a gap.
Then the ground tilts. At Tea Tree Gully, Highbury and Athelstone the plain runs into the escarpment, and gradient stops being an exercise and becomes a condition. That is the whole geography lesson: a grid, a maze of roundabouts, three arterials and a hill, all inside about ten kilometres.