As a roadway designer you are asked to design a horizontal curve for a two-lane road that are 12' wide each. There is an enormous boulder in the way of the construction zone and the minimum distance needed to excavate towards to the center must be solved for. The distance is required to sustain a speed of 55mph at a maximum super-elevation of 10%. Find the minimum distance from the boulder to the center of the road that fulfils the design requirement

Just do question 2

only do question 4

You are asked to design a horizontal curve for a four-lane road. The road has 12-ft lanes. Due to expensive excavation, it is determined that a maximum of 47 ft can be cleared from the road's centerline toward the inside lane to provide for stopping sight distance. If local guidelines dictate a maximum superelevation of 8%, what is the highest possible design speed for this curve?

The question about civil (transportation) engineering. This is my homework,please help me

1. Two vertical parabolic curves have been connected to form a roadway by three gradients: -5.30 %, 4.10 % and -3.70 % respectively. If the length of the second curve is twice as the length of the first curve, compute the following: a. The length of the second curve in ft given that the design speed of the first curve is 80 kph assuming a vertical radial acceleration of 0.3m/s for comfort criterion. b. The length of the second curve in m if the headlight height of the vehicle is 0.73 m above the first curve and the inclined upward angle of the headlight beam relative to the horizontal plane of the vehicle is 1.57'. The design speed for the first curve for this situation is 90 kph. c. The length of the first curve in yard if the total length of the roadway is 745 m given that the second curve has a design speed of 70 kph for passing sight distance with the driver's eye height assumed to be 1.5 mand object height of 0.33 m d. The total length of the roadway in km if a bridge structure…

Determine variables requested below for a horizontal curve with the following characteristics. Length of curve 1255', Radius 1200', sta of PC 12+00 superelevation rotated about the roadway centerline, 3 lane roadway, 14ft lane width, entire road section normal crown=2%, road design speed=60 mph, max superelevation=8% 2) The design/full superelevation, in %, is: O 7.2 O 7.4 O 7.6 O 7.8 O 8.0

Determine the grade compensation and the compensated gradient for a steep road with ruling gradient of 7% and horizontal curve radius 70 m.

A -2.5% grade intersects a 4% grade at sta. 5 + 100 at elev. 50 meters. Compute the stoppingsight distance.Design velocity = 75 kphCoefficient of friction between pavement and tires = 0.15

Show work and answer question 7 only