1. Welcome To Intersection Design Presented at: Bentley 2009 Roads and Bridge Conference Charlotte, North Carolina Presented by: Dirk Karasek The Envision Group, Inc. www.EnvisionCAD.com

2. Goal A Comprehensive Intersection Model

3. Methods Options Secondary Alignments

4. Methods Options Secondary Alignments Multiple Adjoining Corridors

5. Methods Options Secondary Alignments Multiple Adjoining Corridors Overlapping/Clipping Corridors

6. Radius Returns All three options require radius return alignments The multicenter curve command creates horizontal alignments

7. Radius Returns All three options require radius return alignments It also can create vertical alignments

8. Secondary Alignment Method Quick overview Templates are run perpendicular to the reference lines

9. Secondary Alignment Method Quick overview Templates are run perpendicular to the reference lines Only 1 template is required for each roadway

10. Secondary Alignment Method Quick overview Templates are run perpendicular to the reference lines Only 1 template is required for each roadway All template origins are tied to reference line alignments

11. Secondary Alignment Method Quick overview Templates are run perpendicular to the reference lines Only 1 template is required for each roadway All template origins are tied to reference line alignments Radius returns are defined as ‘secondary’ alignments

12. Secondary Alignment Method Quick overview Templates are run perpendicular to the reference lines Only 1 template is required for each roadway All template origins are tied to reference line alignments Radius returns are defined as ‘secondary’ alignments The template ‘bends’ at the secondary alignment

13. Secondary Alignment Method Quick overview Templates are run perpendicular to the reference lines Only 1 template is required for each roadway All template origins are tied to reference line alignments Radius returns are defined as ‘secondary’ alignments The template ‘bends’ at the secondary alignment The radius return alignment is a horizontal control only

14. Secondary Alignment Method Template ‘bends’ at secondary alignment Origin

15. Secondary Alignment Method Template ‘bends’ at secondary alignment

16. Secondary Alignment Method Triangulation results

17. Secondary Alignment Method Suitable when matching minor road to edge of major road

18. Multiple Adjoining/Corridors Quick overview All template origins are tied to horiz/vert alignments

19. Multiple Adjoining/Corridors Quick overview All template origins are tied to horiz/vert alignments Templates are run perpendicular to the reference lines

20. Multiple Adjoining/Corridors Quick overview All template origins are tied to horiz/vert alignments Templates are run perpendicular to the reference lines Templates are also run radial to the radius returns

21. Multiple Adjoining/Corridors Quick overview All template origins are tied to horiz/vert alignments Templates are run perpendicular to the reference lines Templates are also run radial to the radius returns A single template is used for the radius returns

22. Multiple Adjoining/Corridors Quick overview All template origins are tied to horiz/vert alignments Templates are run perpendicular to the reference lines Templates are also run radial to the radius returns A single template is used for the radius returns Vertical alignments along radius returns can be edited to control the edge of pavement or curb flowlines

23. Multiple Adjoining/Corridors Quick overview All template origins are tied to horiz/vert alignments Templates are run perpendicular to the reference lines Templates are also run radial to the radius returns A single template is used for the radius returns Vertical alignments along radius returns can be edited to control the edge of pavement or curb flowlines Corridors can overlap and will automatically ‘clip’ underlying corridors.

24. Multiple Adjoining/Corridors

25. Cons & Pros Mainline and side road each require 3 or 4 unique templates

26. Multiple Adjoining/Corridors Cons & Pros Mainline and side road each require 3 or 4 unique templates ~ 13 corridors required

27. Multiple Adjoining/Corridors Cons & Pros Mainline and side road each require 3 or 4 unique templates ~ 13 corridors required User must determine template start/stop limits

28. Multiple Adjoining/Corridors Cons & Pros Mainline and side road each require 3 or 4 unique templates ~ 13 corridors required User must determine template start/stop limits Corridor definitions can be complex

29. Multiple Adjoining/Corridors Cons & Pros Mainline and side road each require 3 or 4 unique templates ~ 13 corridors required User must determine template start/stop limits Corridor definitions can be complex Changes in design require revisiting many template/station entries

30. Multiple Adjoining/Corridors Cons & Pros Mainline and side road each require 3 or 4 unique templates ~ 13 corridors required User must determine template start/stop limits Corridor definitions can be complex Changes in design require revisiting many template/station entries Finished model is complete with surfaces and components

31. Overlapping/Clipping Corridors

32. Corridors Mainline corridor contains a single template entry

33. Overlapping/Clipping Corridors Corridors Mainline corridor contains a single template entry Sideroad corridor contains a single template entry

34. Overlapping/Clipping Corridors Corridors Mainline corridor contains a single template entry Sideroad corridor contains a single template entry Each quadrant contains a single template entry

35. Overlapping/Clipping Corridors Corridors Mainline corridor contains a single template entry Sideroad corridor contains a single template entry Each quadrant contains a single template entry Sequence of events 1.The mainline ‘clips’ the sideroad model

36. Overlapping/Clipping Corridors Corridors Mainline corridor contains a single template entry Sideroad corridor contains a single template entry Each quadrant contains a single template entry Sequence of events 1.The mainline ‘clips’ the sideroad model 2.The quadrants ‘clip’ both the mainline and sideroad models

37. Overlapping/Clipping Corridors Corridors Mainline corridor contains a single template entry Sideroad corridor contains a single template entry Each quadrant contains a single template entry Sequence of events 1.The mainline ‘clips’ the sideroad model 2.The quadrants ‘clip’ both the mainline and sideroad models 3.A single composite surface is created

38. Clipping Corridors Template along radius returns Origin Point controls used to target mainline or sideroad corridors Variable slope & length

39. Clipping Corridors Templates placed perpendicular or radial Crownline Targeted Quadrant corridor Edge of thru-lane Targeted Normal end- condition applied

40. Overlapping/Clipping Corridors Contours

41. Overlapping/Clipping Corridors Suitable when matching minor road to edge of major road or crown to crown

42. Overlapping/Clipping Corridors Pros & Cons Mainline and side road each require only 1 template

43. Overlapping/Clipping Corridors Pros & Cons Mainline and side road each require only 1 template 1 template for all quadrants

44. Overlapping/Clipping Corridors Pros & Cons Mainline and side road each require only 1 template 1 template for all quadrants Total of 6 corridors required

45. Overlapping/Clipping Corridors Pros & Cons Mainline and side road each require only 1 template 1 template for all quadrants Total of 6 corridors required Easy to define corridors

46. Overlapping/Clipping Corridors Pros & Cons Mainline and side road each require only 1 template 1 template for all quadrants Total of 6 corridors required Easy to define corridors Creates composite surfaces DTM(s)

47. Overlapping/Clipping Corridors Pros & Cons Mainline and side road each require only 1 template 1 template for all quadrants Total of 6 corridors required Easy to define corridors Creates composite surfaces DTM(s)

48. Overlapping/Clipping Corridors Pros & Cons Mainline and side road each require only 1 template 1 template for all quadrants Total of 6 corridors required Easy to define corridors Creates composite surfaces DTM(s) Changes in design may require recreation of radius returns

49. Demo/Questions?

50. Thank You! Intersection Design Presented at: Bentley 2009 Roads and Bridge Conference Charlotte, North Carolina Presented by: Dirk Karasek The Envision Group, Inc. www.EnvisionCAD.com