Guide to Road Design Part 3: Geomteric Design provides road designers and other practitioners with information about the geometric design of road alignments.
Design parameters include: road classification; design speeds; design vehicles; alignment controls; cross-section components, including travel lanes, shoulders and verges; and provisions for public transport and cyclists.
Speed parameters include: operating speed, desired speed and design speed; and their relationship with each other.
Horizontal and vertical alignments include development and application of: circular curves; superelevation; grades; vertical curves; procedures for the grading of a road alignment; and determination of sight distances across vertical curves.
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