4Road design considerations for temporary roads#

Based on the review of current Queensland case examples, and documented practices both Nationally and Internationally, the following road design parameters have been identified where some guidance has been produced with regards to road design guidelines for temporary roads and there is evidence of design exceptions previously being successfully applied.

1. 1.Road cross section – In this technical note, three elements of road cross section are considered being:
2. a.lane widths
3. b.shoulder widths, and
4. c.barrier edge clearance.
5. 2.Sight distance – particularly stopping sight distance
6. 3.Coordination of horizontal and vertical alignment
7. 4.Horizontal alignment
8. 5.Vertical alignment
9. 6.Site Access – acceleration and deceleration lanes for works vehicles at road worksites
10. 7.Temporary road safety barriers – warrants for use.
11. 8.Turn treatment warrants for unsignalised intersections with short periods of higher traffic volumes.
12. 9.Road drainage.

Each road design parameter is discussed in further detail within this section with examples of design exceptions that may be applicable for use in the design of temporary roads for projects in Queensland. Where these example design criteria are being considered for use, the full design exception process shall be undertaken to analyse the alignment, and to identify and evaluate all safety risks that may arise as a consequence of the exception.

For temporary alignments that may be in place for 12 months or more, the design shall, as far as practicable, meet the NDD / EDD design guidelines for permanent roads.