Rural junction improvement and safety

Rural junction improvement and safety

Collection
Experiences and practices

An  analysis  of  road  accident  statistics  for  1995  shows  that  36%  of  accidents  in  Seine-Maritime  occur  at  intersections. Junctions  improvement  thus  plays  an  important  part  in  our  efforts  to  improve  road  safety,  whether  that  means  modifying existing junctions or designing new ones.

This  document includes  a  number  of  explanations  that  will  help  contract  engineers  to  work  with  their  clients

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Description

An analysis of road accident statistics for 1995 shows that 36% of accidents in Seine-Maritime occur at intersections.

Junctions improvement thus plays an important part in our efforts to improve road safety, whether that means modifying existing junctions or designing new ones.

With help from the Operating and Safety Division of the Normandy-Centre Infrastructure Design and Engineering agency, the Local Operating and Safety Unit has examined various existing junction layouts. Close observation of how existing junctions work will give design engineers some vital clues on how to improve safety at junctions.

Whatever the case, a preliminary analysis of the situation must be carried out first. Ready-made solutions should be avoided as they have sometimes led to an unnecessary rise in the number of roundabouts.

This document also includes a number of explanations that will help contract engineers to work with their clients

Summary

Contents

Designs which improve safety.............................. 7

1 - Removing obstacles to visibility ................................. 8

2 - Improving visibility by changing road alignment ....... 10

3 - Traffic island on minor road ..................................... 12

4 - Improving traffic signing .......................................... 14

5 - Levelling the roadway............................................... 16

6 - Orthogonal branches from intersection ..................... 18

7 - Extra width for left turn ............................................ 20

8 - Left-turning lane ...................................................... 22

9 - Reducing the number of access points...................... 24

10 - Roundabout ............................................................ 26

 

Designs which are questionable from the safety point of view ..................................................... 29

1 - Right-turning lane .................................................... 30

2 - Lighting at intersections .......................................... 32

3 - Left-turning lane on the right.................................... 34

 

Prohibited designs ............................................ 37

1.Junctions with many traffic islands ....................... 38

2.Widening the minor road ....................................... 40

3.Widening the main road ......................................... 42

4.Signal-controlled junctions ................................... 44

Details
Title
Rural junction improvement and safety
Réf. Cerema
930A
Catégorie de produit
Publication
Nombre de pages
46 pages
SKU
SKU1915144298
Numéro ISRN
EQ-SETRA--09-ED14--FR+ENG
Editeur
Cerema (ex-Setra)
Auteur collectif
Cerema
Date de parution
Nombre de pages
46 pages
Langue de la publication
English
Type d'auteur
Oeuvre collective

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Rural junction improvement and safety
Réf. Cerema
930A
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