Part 1 - Standards for Design of Roadworks - Section 1.1.0 General

Oct 24, 2026

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Part 1, section 1.1.0 General, sets out governing principles for planning and engineering roadworks site and road layout. It requires consideration of social, environmental, and traffic factors, drainage and alignment constraints, and verification of any existing local layout and road hierarchy. It specifies design basis references, mandates full topographical information, and sets precedence rules when manuals conflict. It also defines design criteria for arterial/sub-arterial and access/collector road types, including superelevation, minimum grades, vertical curves, crossfalls, cyclist provisions, carriageway cross-sections, and public lighting requirements.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages13

Reading Time33 min

AccessFree to download

Division 1 Site and Road Layout

1.1.0 General

1.1.1 Design Criteria

1.1.2 Truncations

Part 1 Standard for Design of Roadworks Division 1 Site and Road Layout 1.1.0 General (1) The ideal site and road layout will result from consideration of the social, environmental and traffic factors, the development layout and engineering constraints. (2) Engineering constraints include drainage overland flow paths, vertical alignment, horizontal alignment, reasonable access to allotments and the road layout is to accommodate these constraints. (3) Prior to preparing a development layout plan, it should be ascertained if a layout already exists for the area in question and to ensure that the road network proposed will generally conform with the overall road hierarchy and open space plan envisaged by the Local Government. (4) Streets are to be designed in accordance with the general parameters outlined in the Transport and Parking Planning Scheme Policy (SC6 .4): Road Hierarchy Table ([6.4.4.1](6.4.4.1)); Centre Road Characteristics Table ([6.4.4.2](6.4.4.2)); Urban Road Characteristics Table ([6.4.4.3](6.4.4.3)); or Rural Road Characteristics Table ([6.4.4.4](6.4.4.4)) . (5) It is essential that full and accurate topographical information be available at the roadworks design stage, to enable an accurate assessment of the suitability of the proposed road locations. (6) Where a conflict or inconsistency occurs between cited manuals, the manual with the latest publication date is to take precedence. 1.1.1 Design Criteria (1) Except as specifically varied hereafter, the design of Arterial and Sub-Arterial Roads is to be based on Ipswich City Council Standard Drawings, Department of Transport and Main Roads (DTMR) design manuals and Austroads Guides to Traffic Management, Guides to Road Design and Guides to Road Safety. (2) Except as specifically varied hereafter, the design of Access Streets, Access Places, Local Industrial Streets, Collector Streets, Major Collector Streets and Industrial Collector Streets is to be based on the Ipswich City Council Standard Drawings and associated technical guidance. (3) Superelevation is to be provided on all Roads and Streets classified as Major Collector or above. (4) The minimum grade for all Roads which will ultimately include kerb and channel is to be 0.5% and the minimum grade for all Roads which will ultimately have earth table drains, is to be 1.0% . Note: Roads constructed without kerb and channel, completely in embankment may have zero grade. (5) A vertical curve, of parabolic form, is to be provided at every change of grade, where the algebraic change of grade exceeds, for— a. Access Places, Access Streets, Collector Streets-1.0%; b. Major Collector, Sub Arterial, Arterial, Major Arterial-0.6% Note: Every effort should be made to provide vertical curves as long as possible, for improved appearance. (6) A minimum 10 metre vertical curve is to be provided where a side road joins a through road at three way intersections with the following characteristics— a. the tangent point of a vertical curve in the side road is to be located at, or outside of the kerb line of the through road; and b. a crest vertical curve that masks the commencement of a horizontal curve is to be avoided. (7) Crossfalls a. all sealed pavements and shoulders are to have crossfalls of 3 .0%; b. the maximum cross-fall on grassed medians on divided roads is to be desirably 1 in 6 with an absolute maximum of 1 in 4; and c . at median openings, the pavement crossfall is not to exceed 5% . Ipswich Planning Scheme: Ordinary Meeting Report Part 1-Standards for Design of Roadworks Page 1 (8) Provision for cyclists is to be included on all sub-arterial and arterial roads, irrespective of whether off-road bicycle or shared bicycle/pedestrian facilities are also provided on an adjacent verge. Note: In the case of roads, cyclist facilities are generally provided by means of marked bicycle lanes or wide kerbside lanes/parking lanes/road shoulders, conforming to

FAQs

What factors must be considered when determining the ideal site and road layout?

The layout should result from social, environmental, and traffic factors, the development layout, and engineering constraints such as drainage overland flow paths and alignment requirements.

What documentation and references guide the arterial and access road designs?

Arterial and sub-arterial designs follow Ipswich City Council Standard Drawings, DTMR design manuals, and Austroads guides; access and collector street designs follow Ipswich City Council Standard Drawings and associated technical guidance.

What are the minimum grade and vertical curve requirements mentioned?

Minimum grades are 0.5% for roads including kerb and channel and 1.0% for roads with earth table drains. Parabolic vertical curves are required at every grade change exceeding specified thresholds, and efforts should be made to provide vertical curves as long as possible.

Oct 24, 2026

Upload by Riley