2Design process#

2.1General#

Note that, for Part 5 work protection methods only, a TGS could be in the form of a work method statement for short-term low- impact works.

2.2Risk assessment#

Replace:

It is important to note that a Design Exceptions Report must be approved by the relevant Road Infrastructure Manager (RIM) and road authority if design exceptions are made or published standards or the AGTTM are not adhered to.

with:

Where variations to the treatments in the Queensland MUTCD Part 3 or QGTTM are proposed, a risk assessment certified in accordance with the requirements of Clause 1.9 of Queensland MUTCD Part 3 must be undertaken.

2.4Essential design principles#

2.4.2Signs#

Replace the dot point:

sign support structures should be placed away from the edge of the roadway, see AS 1742.3

with:

sign support structures should be placed away from the edge of the roadway, and guidance on the placement of sign supports is given in the QGTTM Part 6 Section 6.6.2 and Queensland MUTCD Part 3 Clause 4.3.2.

In line with the requirements of the Queensland MUTCD Part 3, a SURVEYORS AHEAD (TM1-37C, TM1-37-Q01) or LINE MARKERS AHEAD (TM1-40-Q01_1) sign to indicate the presence of surveyors or line markers on foot may be substituted for a Workers (symbolic) sign when required in this Part.

2.4.4Lane width#

Replace Table 2.4 with the following.

*Temporary minimum lane widths are not to be greater than the existing lane widths. This minimum temporary lane width does not apply to curves of radius 250 m or less, or locations where there are fixed vertical obstructions such as fences or safety barriers within 30 cm of the edge of the lane on one or both sides. Where these conditions apply, consider widths wider than those listed above to accommodate large vehicles.

2.5Variations to design#

Refer to Clause 1.9 of the Queensland MUTCD Part 3.