Determine the impact factor of the highway curve having radius of 1546 ft and maximum design speed of 51 mph.

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

A sag curve connects a -1.5 percent grade with a +2.5 percent grade on a rural arterial highway. The criterion selected for design is the minimum stopping sight distance, and the design speed of the highway is 70 mph. Assume the perception-reaction time of 2.5 seconds and a deceleration rate of 11.2 ft./sec^2. a. Determine the length of the curve. b. Compute the elevation of the curve at PVC and PVT if the grades intersect at station (475 + 00) at an elevation of 300 ft.

(b) For the safe road design and smooth traffic flow, combination of transition and circular curve will be constructed to combine two tangent line that have bearing of N 70° E (entry tangent) and S 80° E (exit tangent) respectively. With the aid of sketch, design the minimum length of transition curve and circular curve that has the following characteristics • Design speed = 110 km/hr coefficient of side friction, f= 0.15 Superelevation, e = 5 % • Radial acceleration, c = 0.9 m/s³

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

A horizontal curve is to be designed to connect two tangents on a rural principal arterial with a design speed of 110 km/h. The station of the BC is 545+13.65. It is expected that an existing building will be located at a distance of 15 m from the centerline of the inside lane. Determine the minimum radius that will satisfy the sight distance and superelevation requirements.