both highways connected (N12 & R24) so as for them to indicate that there is an e-toll ahead when travelling westwards to the N3 interchange (every lane on the N12 and R24 west cosigned section passes through the gantry). Right after the e-toll, at the George Bizos Interchange (previously Gillooly's Interchange) with the N3 Highway, the N12 leaves the westerly highway and joins the N3 Eastern Bypass southwards on the Johannesburg Ring Road, leaving the R24 as the straight road west into Johannesburg. Just after the interchange with the N3 & N12, it passes north of the Eastgate Shopping Centre and leaves the City of Ekurhuleni Metropolitan Municipality to enter the City of Johannesburg Metropolitan Municipality. Here, the R24 stops being a freeway. It passes through some of Johannesburg's eastern suburbs in a south-westerly direction, including Bruma, Kensington and Troyeville, before entering the Johannesburg CBD and becoming two one-way streets (one going east as Albertina Sisulu Road, formerly Market Street, and the other west as Commissioner Street). The Carlton Centre, the second tallest building in Africa (the tallest office building in Africa), is located on Commissioner Street. Just before crossing under Johannesburg's M1 Freeway at the suburb of Newtown, it intersects with the eastern terminus of the R41 Road (Main Reef Road) and becomes one street westwards (no longer one-way streets). The R41 route is an alternative route to the R24 route as they both go west to Roodepoort. Next, the R24 runs west to Roodepoort. It passes through the Fordsburg, Mayfair, Mayfair West, Langlaagte North, Crosby, Industria (where it continues by a left & right turn) and Bosmont suburbs before it crosses the N1 Highway (Johannesburg Western Bypass; Johannesburg Ring Road) at the Maraisburg junction and enters Roodepoort. After passing through the Maraisburg and Florida suburbs, the R24 runs in a northwesterly direction through the former CBD of Roodepoort. After bypassing Westgate Shopping Centre, the R24 leaves the City of Johannesburg Metropolitan Municipality and enters Krugersdorp in the Mogale City Local Municipality. Through Krugersdorp, it first passes by Factoria before passing through the southern end of Krugersdorp CBD, where it intersects with the R28 Route. After Krugersdorp West, the R24 makes up the southern border of the Krugersdorp Game Reserve. It then heads north-west, crossing the N14 National Route, towards Magaliesburg, which is a holiday and weekend destination for people of Johannesburg and Pretoria. On this section, before Magaliesburg,