D'Aguilar Highway

The D'Aguilar Highway is a two-lane highway linking the Bruce Highway near Caboolture with the Bunya Highway in Kingaroy in the state of Queensland, Australia. Major towns along the route include Woodford, Kilcoy, Blackbutt, Yarraman, and Nanango. The highway is approximately 164 km in length. The D'Aguilar Highway's highest elevation along its length is 527 m just north of Yarraman, and the lowest point is at 26.8 m just west of Caboolture.

As of 13 December 2007, the D'Aguliar Highway bypasses Caboolture to the north.

State-controlled road
D'Aguilar Highway is a state-controlled regional road, much of which is also rated as "state-strategic". It is defined in three sections, as follows:
 * Number 40A, Caboolture to Kilcoy, regional.
 * Number 40B, Kilcoy to Yarraman, regional and state-strategic.
 * Number 40C, Yarraman to Kingaroy, regional and state-strategic.

State Route 85
The section of this highway between Caboolture and Harlin is part of State Route 85, which extends for over 570 km from Bribie Island to Nindigully, duplexing with the Brisbane Valley Highway (State Route A17) from Harlin to Esk, the New England Highway (State Route A3) from Hampton to Toowoomba, the Gore Highway (National Route A39) from Toowoomba to the Leichhardt Highway, and the southern 19 km section of the Leichhardt Highway (National Route A39/State Route A5) to Goondiwindi.

Proposed Kilcoy bypass
In January 2009, the Department of Transport and Main Roads published details of the preferred design for a bypass of the Kilcoy township. The proposed route follows an abandoned rail corridor, and would have minimal impact on existing infrastructure.

In 2021 significant changes were made to the two main intersections in Kilcoy to improve traffic flow. This seems to have been done as an alternative to the proposed bypass.

Safety improvements
A project to provide safety improvements between Sandy Creek and Kilcoy, at a cost of $19 million, was completed in mid 2023.

Wide centre line treatment
A project to provide wide centre lines near Wamuran, at a cost of $12 million, was completed in September 2022.

Major Intersections
Intersections are listed from west to east.

Intersecting state-controlled roads
The following state-controlled roads, from east to west, intersect with the D'Aguilar Highway:
 * Beerburrum Road
 * Caboolture Connection Road
 * Brisbane–Woodford Road
 * Kilcoy–Beerwah Road
 * Kilcoy–Murgon Road
 * Esk–Kilcoy Road
 * Brisbane Valley Highway
 * New England Highway
 * Nanango–Tarong Road
 * Burnett Highway
 * Kingaroy–Cooyar Road
 * Kingaroy–Barkers Creek Road

Caboolture Connection Road
The Caboolture Connection Road (CCR) is a 8.2 km former section of the D'Aguilar Highway that runs south-east from the highway at Moodlu to the Bruce Highway in Caboolture, Queensland, Australia. It is a state-controlled regional road (number 9905) rated as a local road of regional significance (LRRS).

CCR Route description
The road commences at an intersection with the D'Aguilar Highway (State Route 85) in the locality of Moodlu. It starts as Williams Road and crosses the highway on an overbridge. It then runs south-east as King Street, passing the exit to Bellmere Road to the south-west, and continuing through Caboolture to an intersection with Burpengary–Caboolture Road and Beerburrum Road. It continues east as Lower King Street, crossing the railway line and reaching a bridge over the Bruce Highway, where it ends.

The physical road continues east as Caboolture–Bribie Island Road (State Route 85).

CCR History
With the opening of a new section of road in 2007 to enable the D'Aguilar Highway to bypass the Caboolture CBD, the bypassed section was renamed Caboolture Connection Road.

CCR Upgrade project
A project to upgrade signals and improve intersections on this road, at a cost of $7.5 million, was in construction in July 2022, with most sub-projects already completed.

CCR Major intersections
All distances are from Google Maps. The entire road is within the Moreton Bay local government area.

Esk–Kilcoy Road
Esk–Kilcoy Road is a state-controlled district road (number 405) rated as a local road of regional significance (LRRS). It runs from the Brisbane Valley Highway in to the D'Aguilar Highway in, a distance of 46.8 km. It intersects with Wivenhoe–Somerset Road in.

Kingaroy–Barkers Creek Road
Kingaroy–Barkers Creek Road is a state-controlled district road (number 4202)) rated as a local road of regional significance (LRRS). It runs from the D'Aguilar  Highway in  to the Burnett Highway in, a distance of 22.3 km. It has no intersections with other state-controlled roads.