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European Transport Research Review

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Table 5 Negative-binomial regression model for accidents at junctions with BPRs

From: A comparative evaluation of the safety performance of bus priority route configurations

Variables

Estimate

Standard error

DF

t Value

Pr >|t|

Intercept

0.01

0.64

121

0.01

0.994

Acc_type: 1

1.94

0.35

2439

5.52

 < 0.0001

Acc_type: 2

0.04

0.44

2439

0.08

0.934

Acc_type: 3

0.60

0.40

2439

1.51

0.132

Acc_type: 4

0.67

0.39

2439

1.72

0.085

Acc_type: 5

0

    

BPR type_Bus_over: 1

− 3.45

0.57

2439

− 6.07

 < 0.0001

BPR type_Bus_over: 2

− 2.31

0.69

2439

− 3.35

0.001

BPR type_Bus_over: 30

− 1.20

0.55

2439

− 2.17

0.030

BPR type_Bus_over: 31

0

    

Acc_type*BPR type_Bus_over: 1,1

1.95

0.48

2439

4.10

 < 0.0001

Acc_type*BPR type_Bus_over: 1,2

0.52

0.56

2439

0.94

0.349

Acc_type*BPR type_Bus_over: 1,30

0.04

0.41

2439

0.09

0.925

Acc_type*BPR type_Bus_over: 1,31

0

    

Acc_type*BPR type_Bus_over: 2,1

1.80

0.56

2439

3.23

0.001

Acc_type*BPR type_Bus_over: 2,2

− 0.04

0.73

2439

− 0.06

0.954

Acc_type*BPR type_Bus_over: 2,30

− 0.03

0.52

2439

− 0.05

0.959

Acc_type*BPR type_Bus_over: 2,31

0

    

Acc_type*BPR type_Bus_over: 3,1

1.77

0.52

2439

3.41

0.001

Acc_type*BPR type_Bus_over: 3,2

0.55

0.62

2439

0.89

0.376

Acc_type*BPR type_Bus_over: 3,30

0.18

0.47

2439

0.40

0.692

Acc_type*BPR type_Bus_over: 3,31

0

    

Acc_type*BPR type_Bus_over: 4,1

0.32

0.54

2439

0.59

0.554

Acc_type*BPR type_Bus_over: 4,2

0.18

0.63

2439

0.28

0.779

Acc_type*BPR type_Bus_over: 4,30

− 0.30

0.47

2439

− 0.64

0.525

Acc_type*BPR type_Bus_over: 4,31

0

    

Acc_type*BPR type_Bus_over: 5,1

0

    

Acc_type*BPR type_Bus_over: 5,2

0

    

Acc_type*BPR type_Bus_over: 5,30

0

    

Acc_type*BPR type_Bus_over: 5,31

0

    

avp: 001

0.45

0.50

2439

0.89

0.371

avp: 010

0.51

0.46

2439

1.11

0.268

avp: 011

− 0.18

0.29

2439

− 0.62

0.533

avp: 110

0

    

Year: 1

0.03

0.09

2439

0.27

0.784

Year: 2

− 0.18

0.09

2439

− 1.88

0.060

Year: 3

0.12

0.09

2439

1.40

0.162

Year: 4

0

    

Cat_veh_main: 1

0.04

0.38

2439

0.10

0.924

Cat_veh_main: 2

0.03

0.29

2439

0.10

0.916

Cat_veh_main: 3

0.37

0.25

2439

1.50

0.134

Cat_veh_main: 4

0

    

Cat_veh_sec: 1

− 1.36

0.34

2439

− 4.00

 < 0.0001

Cat_veh_sec: 2

− 0.15

0.29

2439

− 0.53

0.597

Cat_veh_sec: 3

− 0.14

0.32

2439

− 0.46

0.648

Cat_veh_sec: 4

0

    

Cat_bus: 1

− 0.23

0.29

2439

− 0.79

0.427

Cat_bus: 2

− 0.67

0.32

2439

− 2.12

0.034

Cat_bus: 3

0.06

0.26

2439

0.23

0.819

Cat_bus: 4

0

    
  1. Acc_type presents accident types; see Table 4 for variable definitions. Model fit statistics: Pearson Chi-Square/DF = 0.78; R2 = 34.5%. Likelihood ratio test: p < 0.0001.
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