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Table 4 Summary results for critical headways at single-lane roundabouts

From: Gap-accepteance parameters for roundabouts: a systematic review

study name

subgroup within study

mean [s]

sample size

st error [s]

Z - value

p - value

Q

I2 [%]

Gazzarri et al. [45]

A1

3.80

71

0.11

35.98

0.00

23.28

1.19

Gazzarri et al. [45]

A2

3.99

98

0.08

50.00

0.00

23.28

1.19

Gazzarri et al. [45]

A3

4.10

47

0.14

29.59

0.00

23.28

1.19

Gazzarri et al. [45]

A4

3.54

61

0.09

41.27

0.00

23.28

1.19

Rodegerdts et al. [61]

B1

4.20

733

0.04

113.71

0.00

23.28

1.19

Rodegerdts et al. [61]

B2

4.90

76

0.15

32.08

0.00

23.28

1.19

Rodegerdts et al. [61]

B3

4.30

1062

0.05

107.47

0.00

23.28

1.19

Rodegerdts et al. [61]

B4

4.20

820

0.02

272.12

0.00

23.28

1.19

Rodegerdts et al. [61]

B5

5.10

98

0.05

85.04

0.00

23.28

1.19

Rodegerdts et al. [61]

B6

4.20

557

0.04

94.21

0.00

23.28

1.19

Rodegerdts et al. [61]

B7

4.60

92

0.10

47.46

0.00

23.28

1.19

Rodegerdts et al. [61]

B8

4.40

237

0.03

140.13

0.00

23.28

1.19

Rodegerdts et al. [61]

B9

4.20

1314

0.03

133.63

0.00

23.28

1.19

Rodegerdts et al. [61]

B10

4.80

197

0.10

50.49

0.00

23.28

1.19

Rodegerdts et al. [61]

B11

4.90

481

0.05

90.11

0.00

23.28

1.19

Rodegerdts et al. [61]

B12

4.30

3244

0.07

63.03

0.00

23.28

1.19

Rodegerdts et al. [61]

B13

3.90

233

0.12

37.63

0.00

23.28

1.19

Rodegerdts et al. [61]

B14

4.10

528

0.03

138.41

0.00

23.28

1.19

Zheng et al. [17]

C1

5.50

548

0.09

64.38

0.00

23.28

1.19

Zheng et al. [17]

C2

4.60

588

0.05

92.95

0.00

23.28

1.19

Zheng et al. [17]

C3

4.80

282

0.08

57.58

0.00

23.28

1.19

Zheng et al. [17]

C4

3.80

318

0.06

67.76

0.00

23.28

1.19

Fortuijn [44]

D1

3.16

101

0.03

113.42

0.00

23.28

1.19

Fortuijn [44]

D2

3.28

108

0.02

179.40

0,00

23.28

1.19

summary effect (random)

 

4.27

 

0.11

37.46

0.00

23.28

1.19