The plaque commemorates the route from Ipswich to Port Cleveland which was used by wool teams in the 1850s. 

In the mid to late 1840s, Tom Petrie, the son of Andrew Petrie, the earlier explorer who gave his name to the hill at Belmont and overseer of public works in Brisbane during the penal period, marked a road from Cleveland to Eight Mile Plains crossing Bulimba Creek at Wishart and Upper Mt Gravatt, which extended the dray road passing from "Cowper's Plains" through Ipswich to the Darling Downs, enabling the pastoralists on the Downs to transport their produce to the coast for shipment.