Barrier Line Marking
Table of Contents
Barrier Line Marking Assessment Guideline
We have developed a Barrier Line Marking Assessment Guideline to assist with line marking design.
Barrier lines are a subset of longitudinal lines as they separate opposing directions of traffic. They are provided where it is necessary to prohibit drivers from travelling to the right of a longitudinal line in order to overtake other vehicles. They may be installed on two lane two way roads where the sealed pavement widths meet the requirements of AS 1742.2 Section 4.2 Pavement Markings and Delineation and where traffic volumes meet the requirements of AS 1742.2 Section 5.3 Longitudinal lines, but where barrier lines are necessary because of sight distance limitations.
A barrier line is a dividing line that replaces the single broken separation line to prohibit crossing movements from one or both directions. This guideline deals with the methodology for establishing unbroken separation/single barrier line, double one way and double two way barrier line markings and their setting out.
Barrier Line Marking Assessment (Word doc, 2.2MB)
Barrier Line Marking Visibility Report
We have developed an excel spreadsheet that reads in a MX visibility report (example provided below) then calculates and displays where overtaking barrier line marking should be provided.
The start and end chainages are calculated based on the process defined in Australian Standards AS1742.2
An example of the drawing presentation based on the output can be found in drawing 200331-0033.
NOTE: Barrier line marking should be verified on site in accordance with AS1742.2
- Project Instructions and Workflow (Word doc, 133KB)
- MX Visibility Report (input file) - contact for file
- Barrier Line Spreadsheet (Excel, 8.6MB)
Open Roads workflow
- ORD-MX Transformation - Workflow instructions (Word doc, 18.8KB)
- ORD Barrier Line Spreadsheet Example (MP4 Video File, 7.7MB)