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Table 12 Comparison between summary effect (random) and mean values for follow-up headways

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

study name

roundabout

entry lane

mean values [s]

Gazzarri et al. [45]

single-lane

 

2.61

Nicolosi et al. [49]

single-lane

 

3.15

Rodegerdts et al. [61]

single-lane

 

3.22

Zheng et al. [17]

single-lane

 

2.99

Qu X et al. [69]

single-lane

 

2.76

summary effect (random)

  

3.10

Gazzarri et al. [45]

double-lane

right

2.70

Rodegerdts L. et al. (2007)

double-lane

right

3.03

Zheng D. et al. (2011)

double-lane

right

2.70

summary effect (random)

  

2.72

Gazzarri et al. [45]

double-lane

left

2.72

Rodegerdts et al. [61]

double-lane

left

3.16

Zheng et al. [17]

double-lane

left

2.72

Li et al. [71]

  

3.10

summary effect (random)

  

2.85