Understanding Air Pollution from Induced Traffic during and after the Construction of a New Highway: Case Study of Highway 25 in Montreal
Table 2
Average hourly concentration of nitrogen dioxide (ppb) at four stations near to construction site during peak-hour traffic.
Months
Peak hour traffic
Station 1
Station 3
Station
Station 29
2003
2008
2013
2003
2008
2013
2008
2013
2003
2008
2013
January
27.3
20.7
20.1
21.9
17.1
20.4
19.2
22.3
22.5
24.4
February
27
20
26
22.7
17
15.7
19.5
20
23.3
21.2
22.1
March
26.6
18.6
24.6
22.5
14.5
14.5
17.1
18.2
26.9
19.3
23.2
April
17.6
12.7
18.7
14.9
11
11.6
13.3
16.1
21
15.7
18
May
13.6
10.5
16.5
12.2
9.34
12.8
8.52
9.21
21.8
11.3
14.8
June
15.2
9.4
15.4
14.2
9.67
10.6
8.84
10
16.5
10.3
12.3
July
13.1
9.18
15.2
11.9
9.2
9.91
8.4
9.32
14.2
8.8
10
August
14.3
9.37
15.4
11.7
7.78
11.3
8.16
9.57
15
10.2
11.3
September
16.4
12.6
18.6
12.9
10.2
11.2
10.6
12.7
18
13.1
13.6
October
20.2
16.1
22.1
16.1
24.5
13.5
14.4
15.8
20.5
15.1
16.4
November
23
18.9
24.9
14.8
12.2
14.6
14.4
16.8
20.9
17.5
21.5
December
20
26
19.1
14.8
16.4
16.4
21
23.9
18.5
21.4
Average
19.5
14.8
20.3
16.2
13.1
13.6
12.7
14.8
20.3
15.3
17.4
Missing data on average hourly concentration of nitrogen dioxide (ppb); Réseau de surveillance de la qualité de l’air of the City of Montreal has no record of nitrogen dioxide (ppb) data at station 7 for the year 2003.
