The Sunshine Motorway, Brisbane Road and Nicklin Way intersect at the Mooloolah River Interchange, connecting major employment, residential and commercial precincts on the Sunshine Coast.
Traffic demand is exceeding the capacity of the interchange and surrounding road network during peak periods.
This congestion is exacerbated by the conﬁguration of the interchange, which causes some drivers to weave across multiple lanes or take less direct routes to reach their destination.
The conﬁguration and growing number of vehicles using the interchange is reducing average peak period speeds, which were modelled at approximately 36 km/h in 2019, compared with free-ﬂow speeds of approximately 73 km/h. Between 2014 and 2018, 89 incidents were recorded at the intersection and access roads, including one fatality and 33 hospitalisations.
The 2019 Australian Infrastructure Audit estimated that the population of the Sunshine Coast would grow by around 120,000 people between 2016 and 2031, or 33% of its current population.