Transcription of Roads: Geometric design and layout planning
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Roads: Geometric design andlayout planningChapter 77 TABLE OF CONTENTSSCOPE .. 1 INTRODUCTION.. 1 Reference to planning .. 1 Classification of the road and street system.. 2 Measures of effectiveness (MOE) .. 3 Traffic calming .. 4 BASIC design PARAMETERS .. 4 The design vehicle.. 4 The design driver .. 5 The road surface .. 5 THE ELEMENTS OF design .. 6 design speed.. 6 Ceiling speed .. 6 design hour .. 6 SIGHT DISTANCE .. 8 Stopping sight distance (SSD) .. 8 Barrier sight distance (BSD) .. 8 Decision sight distance (DSD) .. 10 Passing sight distance (PSD) .. 10 Intersection sight distance (ISD) .. 10 HORIZONTAL ALIGNMENT.
effect of steep gradients must be borne in mind. Function is defined in terms of two prime components, namely the nature and the extent of ... placed an over-emphasis on the vehicular movement function of the street system. The concept of a hierarchy also implicitly carried with it the notion of one part of the network being more important than
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