highway design process and TIN surfaces

Question 1

different views

Answer 1

Question 2

what is a TIN surface

Answer 2

Question 3

steps 1-6

Answer 3

1. origin/destination choice
2. gather data, including:
   - topography
   - weather
   - design speed
3. route analysis
   - feasability study
4. select preffered route
   - preliminary design
5. set hz allignment
6. find elevations of existing ground at centerline

Question 4

steps 7-10

Answer 4

7. draw centerline of existing ground
8. design profile of new road
9. define the typical cross section template (assembly)
10. get x-sctns of existing ground (EG)

Question 5

steps 11-16

Answer 5

11. combine hz, vert, typical section, EG (corriror)
12. calculate earthworks every 20m station (cut and fill)
13. plot mass-haul diagram
14. are earthworks ok?
    yes - step 15
    no - step 8 (solid arrow), and possibly step 5 (dotted arrow)
15. estimate quantities and prepare contract drawings
16. TENDERING and CONSTRUCTION