center line in civil 3d

1:50

57:34

46:10

6:34

17:22

1:47

2:01

3:55

3:55

2:43

4:18

7:06

2:51

5:33

58:59

12:39

2:51

29:36

59:46

5:32

8:30

12:38

5:05

2:30

8:57

9:01

2:39

2:35

3:43

3:35

3:59

4:04

2:57

3:25

3:14

3:24

2:17

4:58

10:26

4:55