The western terminus is the R82 north of Walkerville. From there it heads east meeting the R59 at an interchange. Skirting the southern border of Katlehong, it continues to the N3, where it forms an interchange. From there it crosses the R103 and R23 before entering the town of Nigel. Here it is co-signed with the intersecting R51 and R42. It continues eastwards, going over the N17 just before reaching its eastern terminus in Devon, at an intersection with the R548.
The R550 is 134 kilometers (83 miles) long.
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