The Gautrain rail network will have two major corridors: South-North and West-East.
- North-South route: Johannesburg to Pretoria
The South-North route starts in the Park Station precinct in central Johannesburg and proceeds north underground for six kilometres beneath the Parktown ridge and Oxford Road to Rosebank Station. From there the single rail track tunnel continues underground for a further five kilometres beneath Dunkeld, Hyde Park, Inanda Ext 1 and Rivonia Road to a station within the Sandton business district. After Sandton Station the route remains underground beneath Sandown, Strathavon, the M1 and Marlboro Drive before appearing onto the surface at Marlboro portal, approximately four kilometres from Sandton.
From Marlboro Station, adjacent to the Marlboro Drive/N3 interchange, the route heads further north, running to the east of Buccleuch until it reaches Midrand Station next to Grand Central Airport. After Midrand Station, the route largely tracks the Old Pretoria-Johannesburg Road (past Glen Austin and Randjesfontein) and the N1 before it stops at the Centurion Station in Centurion’s central business district, just north of Centurion Lake. Thereafter the route runs to the west of the Ben Schoeman highway from the Jean Avenue interchange down the Snake Valley and east of Salvokop into Pretoria.
Pretoria Station is the next stop, 11 kilometres from Centurion, and it will be situated adjacent to the existing Pretoria Station. Here the Gautrain will be able to link to other rail services. The line will then run east for six kilometres, largely using the existing South Africa Rail Commuter Corporation rail corridor, to Hatfield Station.
- The West-East route: Sandton to OR Tambo International Airport
The West-East route will take passengers from Sandton Station, via Marlboro, to Rhodesfield Station in Kempton Park. From there it will connect to a station built within the airport terminal complex at OR Tambo International Airport. The route from Sandton to Marlboro is the same as for the South-North route. After Marlboro Station, the West-East route crosses the northern boundary of the Linbro Park landfill, past the Linbro Park Agricultural Holdings and across the Modderfontein property before connecting to the existing rail corridor, serving the Kelvin Power Station and the Spartan/Isando industrial area, into Rhodesfield. The last link between Rhodesfield and OR Tambo International Airport will negotiate the R21/R24 road interchange.
The Sandton-OR Tambo International Airport rail service will take airline passengers between the two points in less than 15 minutes, whereas the trip between Johannesburg and Pretoria will be less than 40 minutes.