The R21 corridor linking Pretoria to Johannesburg and OR Tambo Airport is a priority for SANRAL because of the role it plays in moving people, goods and services. It handles a massive amount of traffic, with an average daily volume of over 45,000 vehicles in each direction, 11% of which is heavy vehicles. SANRAL has announced a R309 million investment for partial reconstruction of 14km of the R21 from the Pomona Road Interchange close to OR Tambo International Airport to the Olifantsfontein Road Interchange in the direction of Pretoria. Work started in February 2024 after a three-month mobilisation period, and will continue over a period of 24 months. The project includes a traffic accommodation plan to carefully manage lane closures and ensure minimal impact during peak traffic hours.