In 2015 the Alice Springs Town Council engaged GREENHILL to scope a 30-Year Infrastructure Plan to guide authorities in making decisions regarding the funding and investments for the Township.
A key consideration of the plan was to future proof the Stuart Highway at Heavitree Gap from the threat of being inundated by Todd River flooding in a major storm event. In the event of the road being flooded, it will have to be closed to traffic in all directions, resulting in safety implications and significant economic loss for the local communities.
GREENHILL proposed an elevated road solution to future proof the Stuart Highway and was instructed by council to provide a high level concept of the proposed scheme.
The design involved investigating railway design clearances to the bridge structure, identifying key constraints for the elevated road in consideration of horizontal and vertical geometry, preparing a horizontal concept on aerial photography and a typical cross section plan and preparing plans for community consultation.
Key design considerations were to increase the number of carriageways along the highway with minimal impact to the Todd River channel capacity and to ensure that the elevated road graded back to connect with the existing highway with minimal impact to existing infrastructure such as the existing Stuart Highway/South Terrace/ Gap Road/ Bradshaw Drive roundabout.
Please click on the thumbnails below to view full-size images