Curves

Question 1

What is an important consideration regarding speed?

Answer 1

Design curve to accomodate speed rating of road

Question 2

What is the biggest vehicle that uses forest roads?

Answer 2

Lowbed Semi towing a Tower yarding system

Question 3

What is the minimum radius in forestry roads?

Answer 3

20m

Question 4

What is the difference between a chord and a tangent?

Answer 4

Tangent intersects circle 1 time and

Chord intersects twice

Question 5

What defines how tight you should make a curve?

Answer 5

Sharp enough that trucks can still get around it while staying as close to the grade line as possible

Question 6

What must you do when SS exceeds 60 %?

Answer 6

Hire a geotech.

Question 7

Why do we draw profiles?

Answer 7

Drawing profiles helps engineers catch mistakes before spending on roads
- it also provides accurate instructions for the road crew who may not fully understand the negative impact of steep pitches.