Run-off-road crashes account for more than twenty percent of the annual Australian crash cost of $15 billion. A significant proportion of crashes involve roadside objects (including trees, service poles, embankments, fences and walls). Of these, approximately thirty percent result in a fatality.
The Roadside Impact Severity Calculator (RISC) is a free application developed by Transport and Main Roads based on a methodology established by the American Association of State Highway Transport Officials (AASHTO) published in the Roadside Design Guide. RISC allows the user to input road and hazard characteristics, together with potential treatment options. The software performs a quantitative evaluation of hazardous roadside objects by calculating a benefit cost ratio for treatment options. Designers can then select a treatment, based on the goal of achieving a return on investment consistent with other road infrastructure projects. It is intended to be used in conjunction with Chapter 8 (Identification, Prioritisation and Treatment of Hazardous Roadside Objects on Existing Roads) in the Road Planning and Design Manual.
- Download the file 'RISC.exe' to a temporary directory.
- Run 'RISC.exe' to install RISC. A default program group 'RISC Application' will be created. The RISC software will be installed in the destination directory you nominate during the install process (the default install directory is C:\Program Files\Main Roads\Risc).
These crash costs are for utilisation in the RISC V126.96.36.199 program. The previous crash costs values can be utilised to compare calculations made in previous RISC calculations. The current crash costs should be utilised with all current calculations.
RISC crash cost updates:
- Windows NT
- Windows 2000
- Windows 98/ME
- Windows XP
For more information contact Traffic Engineering and Road Safety Branch: