The sale proceeds are set to be $2.8 billion from Australian Super, Canada Pension Plan and UniSuper.
There is also a potential earn-out of $93 million between financial years 2024-2026.
The assets consist of Transurban’s Greater Washington Area's operational assets which include express lanes and three projects in delivery and development.
Shares in Transurban (ASX:TCL) are trading 1 per cent higher at $14.24.