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Road and Motorway Design

Review of Design Rules relating to Visibility and Radii of Crest Curves in the Vertical Alignment

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This guide revises the geometric design technical baselines with regard to visibility and crest curve radii in the vertical alignment:
• Firstly, it revises all visibility rules to reflect the current state of the art, taking a performance-oriented approach. This provides the basis for harmonising the rules contained in the various technical baselines;
• Secondly, it revises the design rules defining the minimum radii of crest curves in the vertical alignment.

 

 

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Description

For the French national road network, this document is considered to be an Instruction, as determined by the Technical Memorandum issued on 01/10/2018. For other road networks, authorities may use this guide, which is intended for use by all developers, when defining projects for which they are the project owner.

Sommaire

Part 1
Review of Visibility Rules
1 - Introduction
2 - General provisions
3 - Visibility of obstacles
4 - Visibility on bends
5 - Visibility at standard at-grade junctions
6 - Visibility at roundabouts
7 - Visibility at traffic light-controlled junctions
8 - Visibility of exits (at interchanges, rest and service areas)
9 - Visibility of entrances (at interchanges, rest and service areas)
10 - Visibility at slip roads and branches
11 - Visibility under structures
12 - Visibility of refuges
13 - Visibility of arrester beds
14 - Visibility of emergency accesses
15 - Overtaking visibility (on single-carriageway roads)
16 - Visibility for public transport lanes
17 - Visibility of pedestrian crossings
Review of Minimum Radii of Crest Curves in the Vertical Alignment
1 - Introduction
2 - Recommendations
Crest curve radii must be determined according to the visibility to be provided
(see Part 1 "Review of Visibility Guidelines").
Bibliography
Glossary
Table of notes
Appendix 1 - Principal Sight Distances
Appendix 2 - Summary of Visibility Rule Verification Conditions
Appendix 3 - Visibility Calculations
Appendix 4 - Use of the "Stopwatch Method" to Measure Visibility Conditions at At-Grade Junctions
Appendix 5 - Conventional Speed on Branches and Slip roads

Détails
Titre
Road and Motorway Design
Numéro ISBN
978-2-37180-555-2
Catégorie de produit
Ouvrage
Nombre de pages
56 pages
Numéro ISSN
2276-0164
Référence
SKU2222314532
Editeur
Cerema
Date de parution
Nombre de pages
56 pages
Langue de la publication
Anglais
Type d'auteur
Oeuvre collective

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Road and Motorway Design
Numéro ISBN
978-2-37180-555-2
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