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Table 6 Summary results for critical headways at double-lane roundabouts - outer circulating lane

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

4.33

59

0.14

30.80

0.00

15.12

0.00

Gazzarri et al. [45]

A2

3.50

36

0.13

26.25

0.00

15.12

0.00

Gazzarri et al. [45]

A3

3.85

56

0.12

32.74

0.00

15.12

0.00

Gazzarri et al. [45]

A4

3.56

43

0.09

38.27

0.00

15.12

0.00

Gazzarri et al. [45]

A5

3.19

69

0.10

33.12

0.00

15.12

0.00

Rodegerdts et al. [61]

B1

4.90

307

0.12

40.88

0.00

15.12

0.00

Rodegerdts et al. [61]

B2

3.40

35

0.20

16.76

0.00

15.12

0.00

Rodegerdts et al. [61]

B3

4.10

813

0.06

73.06

0.00

15.12

0.00

Rodegerdts et al. [61]

B4

4.20

604

0.05

79.40

0.00

15.12

0.00

Rodegerdts et al. [61]

B5

4.00

115

0.11

35.75

0.00

15.12

0.00

Rodegerdts et al. [61]

B6

4.40

182

0.10

42.40

0.00

15.12

0.00

Zheng et al. [17]

C1

3.50

319

0.04

78.14

0.00

15.12

0.00

Zheng et al. [17]

C2

3.80

268

0.07

51.84

0.00

15.12

0.00

Zheng et al. [17]

C3

4.10

194

0.08

51.91

0.00

15.12

0.00

Zheng et al. [17]

C4

4.40

194

0.11

40.86

0.00

15.12

0.00

Zheng et al. [17]

C5

3.00

639

0.02

126.39

0.00

15.12

0.00

Zheng et al. [17]

C6

3.40

670

0.04

88.01

0.00

15.12

0.00

Fortuijn [44]

D1

2.89

11

0.40

7.26

0.00

15.12

0.00

summary effect (random)

 

3.82

 

0.13

28.79

0.00

15.12

0.00