Audit de sécurité
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Audit de sécurité

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National Roundabout Conference 2005 DRAFTThe Safety of Roundabouts in BelgiumD. AntoineNational Roundabout Conference 2005 DRAFTRoundabouts and Traffic Lights : Evolution Number of traffic lights and roundabouts in Wallonia700600500Traffic lights in National RoadsRoundabouts in National Roads40030020010001990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002National Roundabout Conference 2005 DRAFTEvaluation of roundabouts3 Evaluations1) Before - After2) Accidents Frequency3) Comparisons : Roundabouts - Traffic lights;Belgium (Wallonia) - FranceNational Roundabout Conference 2005 DRAFTBefore - AfterAssessment of the changing into roundaboutsHeavy improvemmentDeterioration25%27%No significant Improvementresults28%20%National Roundabout Conference 2005 DRAFTBefore - AfterYearly average number of injury accidents"After"9837265432110 "Before"4012345678National Roundabout Conference 2005 DRAFTBefore - After122 crossroads (1992-2000)Before After736 accidents 411 accidents544 years 520 yearsreduction of 42 %National Roundabout Conference 2005 DRAFTBefore - AfterOpen country : - 50 %Semi-urban: -46 %Urban: -15 %But on the same period, - 15 % of accidents in other crossroadsNational Roundabout Conference 2005 DRAFTBefore - After : ComparisonFrance : - 60 % of accidents (100 R., Haute-Garonne)- 66 % of accidents (SETRA, CETE de l'Ouest, ...)- 88 % (55 R., Loire Atlantique 1979-2000)Denmark : - ...

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Reads 97
Language English
The Safety of Roundabouts in Belgium
D. Antoine
RabououndndTrts aLcgifaif :vEth sn ioutol
700
100
Number of traffic lights and roundabouts in Wallonia
600
Traffic lights in National Roads Roundabouts in National Roads
2002
2001
2000
1999
1998
1997
1996
1990 1991 1992 1993 1994 1995
0
500 400
300
200
Evaluation of roundabouts
3 Evaluations
1) Before - After
2) Accidents Frequency
3) Comparisons : Roundabouts - Traffic lights;
Belgium (Wallonia) - France
Before - After
Assessment of the changing into roundabouts Heavy improvemment 25%
Deterioration 27%
No significant results 20%
Improvement 28%
"After" 9
8 7 6
5
4
3
2
1
40 0
1
Yearly average number of injury accidents
3
2
3
4
5
2
6
1
7
"Before" 8
Before - After
122 crossroads (1992-2000)
Before
736 accidents
544 years
After
411 accidents
520 years
reduction of 42 %
Before -
Open country :
Semi-urban :
Urban :
- 50 %
- 46 %
- 15 %
But on the same period,
After
- 15 % of accidents in other crossroads
tsouMa, ou rabnd
The Netherlands : - 71 %
Denmark : - 53 % (urban), -84 % (open country)
France : - 60 % of accidents - 66 % of accidents(SETRA, CETE de l'Ouest, ...) - 88 %(55 R., Loire Atlantique 1979-2000)
Before - After : Comparison
USA : - 76 % - 8 8 %
Australia : - 71 %
alyr)dnndabouts(24 rou8( ,aMni)eabndou r13()stuodaboroun(181tu)setuaH ,.R 001()onne-Gar
Roundabouts : Acci. Frequency
9
8
7
6 5
4 3
2
1
0 0
5 000
Injury accidents frequency in roundabouts
10 000 15 000 20 000 25 000 30 000 35 000 40 000 45 000 50 000 Average daily coming in traffic
Open cou Semi-urba Urban
Roundabouts : Acci. Frequency
151 Roundabouts (1992-2000) - 736 yea
for an AADT = 10 000
Open country :
Semi-urban :
Urban :
Accidents 0,527
0,488
0,502
~ 0,5  
Serious Acci. 0,169
0,115
0,082
simple to double
Traffic lights : Acci. Frequency
6
5
4
3
2
1
0 0
5 000
Injury accidents frequency in traffic lights
10 000 15 000 20 000 25 000 30 000 35 000 40 000 45 000 Average daily coming in traffic
Open country Semi-urban Urban Linear (Urban) Linear (Semi-urba Linear (Open coun