I have few questions in engineering class called Highway design

Problem 1

What is the impact of increasing the degree of curvature on lane widening (assuming that the lane width and vehicle are the same?Secondly, how does the lane widening change with vehicle selection?

Problem 2

What are the main design considerations (please include benefits and consequences) associated with stopping, decision and passing site distance?

Problem 3

As an engineer you have a segment of highway that has a grade of 8% for approximately 1 mile.Is this segment a problem, if so what would you do to modify it?Please include all calculations and drawings

Problem 4

A two lane road has grade 1 of 4% and a grade 2 of -3%, with a VPI of 20+00 at 500 feet above sea level.The requirements of the road suggest that the lowest vertical clearance between the road and the bridge deck is 14 feet. What is the maximum height and the maximum design speed for the road?

Problem 5

A 4 lane road has a normal cross slope is 1.5%, 12 foot lanes, and horizontal sight offset with respect to the edge of the road is 20.0 feet.The speed limit on the road is 45 mph and the design speed is 55 mph.The PI is located at 1200+00 and includes the forward tangent is N 25⁰ E and the back tangent is S 50⁰ E.Using the above givens please design all horizontal design components. Please include a drawing by hand of the final design.