[PRO] City Gates

[bits]

Prospect currently makes sense as the main road from almost all of the country except Victoria, Tasmania and southeastern SA.

Why? Prospect is one of the most minor of all the road entries to Adelaide. The only less worthy would be something like Medindie Rd. Maybe you meant Main North Road.

Entries to Adelaide/North Adelaide:
Glen Osmond
Hutt
Unley
Peacock(King William south)
Sir Cowen Lewis(Morphett south)
Goodwood
Anzac
Sir Donald Bradman
Glover (Henley Beach/Currie west)
Port
War Memorial
Jeffcott
Prospect
Main North
Medindie
Melbourne
Bundeys
Botanic (North Tce East)
Rundle
Bartels (Pirie east)
Wakefield

Is that 21 entry points?
The main entries for tourists are Sir Donald Bradman(Airport) , Port(from South Rd/Northern Connector etc) and Glen Osmond(SE Freeway).
Anzac would see a bunch of tourists to/from Glenelg, McClaren Vale, Victor Harbor and Kangaroo Island.

I would add Mann Rd(North East Road route) to the list of majors as it has land available and is the North East entry to the CBD. Botanic just isn't the same as Port, Anzac and Glen Osmond; Mann is their equal.

[bits]

However, when the Northern Connector, T2T and the bit at Regency Road is completed, what will be signposted to "Adelaide"?

I think signs will certainly bring you in via Port Rd.

[SBD]

Prospect currently makes sense as the main road from almost all of the country except Victoria, Tasmania and southeastern SA.

Why? Prospect is one of the most minor of all the road entries to Adelaide. The only less worthy would be something like Medindie Rd. Maybe you meant Main North Road.

Entries to Adelaide/North Adelaide:
Glen Osmond
Hutt
Unley
Peacock(King William south)
Sir Cowen Lewis(Morphett south)
Goodwood
Anzac
Sir Donald Bradman
Glover (Henley Beach/Currie west)
Port
War Memorial
Jeffcott
Prospect
Main North
Medindie
Melbourne
Bundeys
Botanic (North Tce East)
Rundle
Bartels (Pirie east)
Wakefield

Is that 21 entry points?
The main entries for tourists are Sir Donald Bradman(Airport) , Port(from South Rd/Northern Connector etc) and Glen Osmond(SE Freeway).
Anzac would see a bunch of tourists to/from Glenelg, McClaren Vale, Victor Harbor and Kangaroo Island.

I would add Mann Rd(North East Road route) to the list of majors as it has land available and is the North East entry to the CBD. Botanic just isn't the same as Port, Anzac and Glen Osmond; Mann is their equal.

I assumed that "Prospect" referred to a suburb not a road. The suburb of Prospect is bounded by Main North Road from north of Regency Road to south of Nottage Terrace. Main North Road and Glen Osmond Road carry route A1 status.