F
C
40
100
Concord (Interstate/Primary)
30
80
20
60
10
40
0
20
10
0
Top of Subgrade
20
Air Temperature
20
30
22
11
30
19
8
27
17
14
6
26
Jun
Aug
Sep
Nov
Jan
Feb
Apr
Sep
Jun
Jul
Figure 12. Annual temperature at the top of the subgrade (interstate pavement system), Con-
cord, New Hampshire.
F
C
40
100
Concord (Secondary)
30
80
20
60
10
40
0
20
10
0
Top of Subgrade
20
Air Temperature
20
30
22
11
30
19
8
27
17
6
26
14
Jun
Aug
Sep
Nov
Jan
Feb
Apr
Jun
Jul
Sep
Figure 13. Annual temperature at the top of the subgrade (secondary pavement system), Con-
cord, New Hampshire.
18