M13 (Durban)

The route starts in the Durban Central Business District at an intersection with the M4. For the first few kilometres of its length, it runs parallel to the N3 on both sides as King Ndinuzulu Road North and King Ndinuzulu Road South (formerly Berea Road; one-way-streets). At the Tollgate Bridge, it then turns to the south and passes westwards through Mayville (where it is co-signed with the M10 for a few metres), before turning north and crossing under the N3 to pass through Sherwood.

At 45th Cutting, the route becomes a dual-carriageway freeway for the rest of its length. The route passes over the N2 Highway (Durban Outer Ring Road) westwards as a flyover and passes through Westville and Cowies Hill. The route then briefly touches the N3 at the Paradise Valley interchange (eastbound only) (motorists can drive from the N3 west onto the M13 west and from the M13 east onto the N3 east), before passing west-north-west through Pinetown.

After Pinetown, the route goes up Fields Hill, a 3 km 1:15 gradient (this section is notorious for heavy vehicle accidents that can close an entire carriageway of the road[1][2][3]). The route then enters the Upper Highway Area,[4] passing westwards through Kloof and Gillitts, before the R103 diverges, providing access to Hillcrest. The route then passes south of Hillcrest and through Assagay before merging with the N3 freeway (westbound only) at the Key Ridge Interchange, where it ends.

The route is roughly 35 km long.

The M13 is the main thoroughfare to Durban for residents of the nearby towns of Westville, Pinetown, Kloof, Gillitts and Hillcrest.

The M13 between the Paradise Valley interchange and its termination at the N3 used to be part of the N3 route until 1986, when the N3 was re-routed to pass south of Pinetown, Westmead and Winston Park. The M13 remains an alternative route to the N3, and is commonly used by motorists wishing to avoid the Mariannhill Toll Plaza, located on the N3 outside Westmead.