Evaluating the Effects of One-Way Traffic Management on Different Vehicle Exhaust Emissions Using an Integrated Approach
Table 5
Emission rate of three pollutants before and after one-way traffic management in intersections.
Intersection number
CO emission (mg/s)
HC emission (mg/s)
NOx emission (mg/s)
Before
After
Difference
Relative difference
Before
After
Difference
Relative difference
Before
After
Difference
Relative difference
1
130.26
121.30
−8.96
−6.88%
5.89
5.15
−0.74
−12.56%
38.24
33.06
−5.18
−13.55%
2
117.81
102.94
−14.87
−12.62%
5.32
4.74
−0.58
−10.90%
34.58
30.80
−3.78
−10.93%
3
17.69
10.49
−7.20
−40.70%
0.80
0.47
−0.33
−41.25%
5.19
4.10
−1.09
−21.00%
4
32.51
13.37
−19.14
−58.87%
1.47
0.60
−0.87
−59.18%
9.545
3.92
−5.63
−58.98%
5
20.99
8.85
−12.14
−57.84%
0.95
0.42
−0.53
−55.79%
6.16
2.59
−3.57
−57.95%
6
34.77
17.69
−17.08
−49.12%
1.57
0.81
−0.76
−48.41%
10.21
5.19
−5.02
−49.17%
7
53.29
46.30
−6.99
−13.12%
2.41
2.09
−0.32
−13.28%
15.64
13.59
−2.05
−13.11%
8
60.29
48.15
−12.14
−20.14%
2.72
2.17
−0.55
−20.22%
17.7
14.13
−3.57
−20.17%
9
20.37
9.26
−11.11
−54.54%
0.92
0.41
−0.51
−55.43%
5.98
2.71
−3.27
−54.68%
10
29.83
12.75
−17.08
−57.26%
1.34
0.57
−0.77
−57.46%
8.75
3.74
−5.01
−57.26%
11
118.53
109.68
−8.85
−7.47%
5.36
4.96
−0.40
−7.46%
34.79
32.19
−2.6
−7.47%
12
136.43
122.85
−13.58
−9.95%
6.17
5.55
−0.62
−10.05%
40.05
36.06
−3.99
−9.96%
13
30.45
10.08
−20.37
−66.90%
1.37
0.45
−0.92
−67.15%
8.94
2.96
−5.98
−66.89%
14
43.21
39.92
−3.29
−7.61%
1.95
1.81
−0.15
−7.69%
12.68
11.71
−0.97
−7.65%
15
14.61
8.64
−5.97
−40.86%
0.66
0.39
−0.27
−40.91%
4.28
2.53
−1.75
−40.89%
16
21.61
19.70
−1.91
−8.84%
0.97
0.85
−0.12
−12.37%
6.34
5.22
−1.12
−17.67%
Mean values
55.17
43.87
−11.29
−20.46%
2.49
1.96
−0.53
−21.29%
16.19
12.78
−3.41
−21.06%
Paired t-value
8.179
8.499
8.136
Note: The difference is equal to the emission after setting one-way traffic management subtracted by the emission before one-way traffic management. denotes significance in the 99% confidence level.
