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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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Publié par

Ubbe

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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

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

40 0

Yearly average number of injury accidents

"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

6 5

4 3

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

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

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