4. Access Layer


ROADS, TRACKS and LANES are relatively permanent features in landscapes. Their placement defines our movement and should integrate all of the elements these pathways connect with.


For Curious Minds ๐Ÿง 

Handbook Outline

The sections of the 4โ€ขAccess chapter are as follows:

Introduction to the Access Layer

4.01 โ€“ Applying the Access Layer


4.02 โ€“ Design Process
4.03 โ€“ Assessment
4.04 โ€“ Concept Design
4.05 โ€“ Risk, Impact, Mitigation
4.06 โ€“ Field Reconnaissance
4.07 โ€“ Road Types and Class
4.08 โ€“ Alignment
4.09 โ€“ Curvature & Coordination
4.10 โ€“ Design Speed & Stopping Distance
4.11 โ€“ Road Network
4.12 โ€“ Road Width
4.13 โ€“ Surface Design
4.14 โ€“ Drainage
4.15 โ€“ Crossing Types & Location
4.16 โ€“ Culvert Crossings
4.17 โ€“ Bridge Crossings
4.18 โ€“ Ford Crossings
4.19 โ€“ Fish Passage Design
4.20 โ€“ Debris Control
4.21 โ€“ Detailed Design & Analytics
4.22 โ€“ Headlands
4.23 โ€“ The City Forest


4.24 โ€“ Contractors
4.25 โ€“ Equipment
4.26 โ€“ Timing
4.27 โ€“ Surveying
4.28 โ€“ Clearing & Stripping
4.29 โ€“ Subgrade Suitability
4.30 โ€“ Grading
4.31 โ€“ Slope Stabilisation
4.32 โ€“ Compaction
4.33 โ€“ Surfacing
4.34 โ€“ Surface Drainage
4.35 โ€“ Subsurface Drainage
4.36 โ€“ Culvert Crossing Installation


4.37 โ€“ Maintenance Planning


4.1 โ€“Road Works Typology
4.2 โ€“ Components to Consider in Sensitive Areas
4.3 โ€“ Penetrometer Conversion Chart for Equivalent CBR
4.4 โ€“ Priority Decisions for Installation of New In-stream Structures
4.5 โ€“ Flood Occurrence Intervals & Water Table Culvert Spacing
4.6 โ€“ Pavement and Subgrade Stabilisation
4.7 โ€“ Gravel Coverage (depth per width of road)
4.8 โ€“ Gravel Spreading Rate per Truckload
4.9 โ€“ Speed/Curve Radius Relationship & Talbot Formula
4.10 โ€“ Manningโ€™s Roughness Coefficient for Channels (n)
4.11 โ€“ Order of Works Assessment Checklist
4.12 โ€“ Field Reconnaissance Survey Checklist for Access

References & Further Reading


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