The sag vertical curve has a back tangent grade of -3% and a forward tangent of +2% is to be designed on the basis of a headlight sight distance of a car travelling along the curve equals the minimum safe stopping distance with following specifications: Design Velocity = 120kph Perception-Reaction Time = 0.75 sec Side Friction = 0.15 %3D (a) Compute the sight distance. (b) If the head lamps are 0.75m above the road surface and their beams tilt upward at an angle of 1-degree above the longitudinal axis calculate the length of the curve. (c) If the station of P.C. is 10+540 and elevation 156.5m Find the elevation of the lowest point

The sag vertical curve has a back tangent grade of -3% and a forward tangent of +2% is to be designed on the basis of a headlight sight distance of a car travelling along the curve equals the minimum safe stopping distance with following specifications: Design Velocity = 120kph Perception-Reaction Time = 0.75 sec Side Friction = 0.15 %3D (a) Compute the sight distance. (b) If the head lamps are 0.75m above the road surface and their beams tilt upward at an angle of 1-degree above the longitudinal axis calculate the length of the curve. (c) If the station of P.C. is 10+540 and elevation 156.5m Find the elevation of the lowest point

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

A horizontal curve with a radius of 800 ft connects the tangents of a two-lane Highway that has a posted speed limit of 35 mi/h. If the highway curve is not super elevated, e =0, determine the horizontal sightline offset (HSO) that a large billboard can be placed from the centerline of the inside lane of the curve, without reducing the required SSD. Perception-reaction time is 2.5 sec, and f = 0.35. when S<L and S>L.
The reaction at the support A and B is?
A car moving down a sag curve having sloped of -3% and +2%. The head lamp is 0.80m above the road surface. If the safe stopping distance is 400m for a lenght of curve of 300m, determine the angle that the beam of the car's head will make above the longitudinal axis of the car. a. 0.96 degree b. 1.2 degree c. 1.32 degree d. 0.89 degree
A single-lane off ramp has a radius of curvature of 1,500 ft. The ramp connects two freeways that are perpendicular (i.e., a total of 90° turn). Brush and other visual obstructions are cleared to 25 ft from the centerline of the off ramp. Assume a driver reaction time of 2.5 seconds. (a) What is the stopping sight distance for this curve? (b) What speed limit should be posted for this ramp? (c) What superelevation is required for this curve to be safe to navigate?
A sImpl3 curv3 has A radius of 2 8 0 meters and its distance from the point of cUrvAtur3 to the p0int of tang3ncy along the curv3 is 2 4 0 m3t3rs. Compute the distance from the midpoint of the long chord to the midpoint of the curve. Compute the area bounded by the tangent and the portion outside the central curve. Compute the central angle of the curve using arc basis.
A vertical curve joining a (-5%) and (+3%) grades in a rural highway has a design speed of 100kph. The tangents intersect at a station (225+71.35) at an elevation of 290m. Caleulate the elevations of intermediate points on the curve each 100m, and determine the stations and elevations of PVC, PVT. It s important to know that the driver acceleration rate is 3m/sec2 and the perception & reaction time is 2.5 seconds.
QUESTION 3 A vertical curve is needed to join to tangents; G₁-5% and G₂-2%. Assuming the worst case scenario for braking, and the AASHTO recommended values for deceleration and perception-reaction time, calculate the minimum length of curve (ft) needed to satisfy the safety criteria. The design speed is 50 mph.
A vertical curve is formed on a two lane undivided highway between the tangents of 1 gradient + 1 Assume the height of driver's eye and height of obstruction and 100 50 as 1.4 m and 0.18 m respectively. Determine the length of vertical curve so formed considering stopping sight distance calculated using the following parameters. Design speed of vehicle = 80 kmph Reaction time = 2.5 sec Down gradient = 2.5% Coefficient of longitudinal friction = 0.38
A vehicle travelling at design speed of 80 kmph on a descending gradient of 2.5% meets on ascending grade of 3%. Calculate the minimum length of vertical curve required (in meters) to facilitate smooth movement of vehicle considering head light sight distance of 100 m and assume that passenger is comfortable is all conditions,
A simple horizontal curve has 35 degrees of curvature and subtends an angle of 110 degrees. If the PC is at station 3 + 65.00 ft, what is the last deflection angle (degrees) (i.e. the angle subtended by the roadway between the last full station and the PT)? Response Feedback: ΔΙ L
answer question 12 only