Transportation Systems 1
1. A simple circular curve exists with a degree of curve D = 10, and e= 0.10. A structure is proposed on land on the inside of curve. Assume the road is on level grade. Determine:
(a) The radius of the curve
(b) The current maximum safe speed of the curve
(c) The minimum distance allowable between the proposed structure and the centerline of the curve such that the current maximum safe speed of the curve would not need to be reduced
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6:47 1 4 Search <Back Hw#3-2019.doc 15- 10. A horizontal curve is designed for a two-lane...
6:47 1 4 Search <Back Hw#3-2019.doc 15- 10. A horizontal curve is designed for a two-lane road in mountainous terrain. The following data are known. Intersection angle: 40 degrees Tangent length: 436.76 feet Station of Pl: 2700+10.65 fs- 0.12 e- 0.08 Determine the following. (a) Design speed (b) Station of the PC (c) Station of the PT (d) Deflection angle and chord length to the first even 100 ft station. 15-11. A proposed highway has two tangents of bearings N...
NUMBER 8 ONLY 7. You are asked to design a horizontal curve with a 40-degree central...
NUMBER 8 ONLY
7. You are asked to design a horizontal curve with a 40-degree central angle for a two-lane road with 10-ft lanes. The design speed is 70mph, superelevation is 6%, and the coefficient of friction is 0.10. Determine the radius, degree of curvature, and the curve length. [8 points] 8. For the horizontal curve in the above problem, what distance must be cleared from the inside edge of the inside lane to provide adequate stopping distance? [6 points]
Help please I don't no how to do these The curved section of a horizontal highway...
Help please I don't no how to do these
The curved section of a horizontal highway is a circular unbanked areof radius 760 m. If the coefficient of statiefriction between this roadway and typical tires is 0.40m, what would be the maximum safe driving speed for this horizontal curved section of highway? When a car goes around a banked circular curve at the proper speed for the banking angle, what force cause it to follow the circular path? gravity the...
9. When designing winding roads through the country-side, civil engineers need to take into consideration the...
9. When designing winding roads through the country-side, civil engineers need to take into consideration the maximum safe sideways acceleration (centripetal acceleration from friction) for rounding a turn is ac 1 m/s2. What is the minimum radius of the curve in the road if the maximum speed is 45 mph? (Ans: 404.7 m)
Question 1(5 points) The design speed of a multilane highway is 60mil/hr, what is the minimum...
Question 1(5 points) The design speed of a multilane highway is 60mil/hr, what is the minimum sight distance that should be provided on the road if (a) the road is level and (b) the road has a maximum grade of 4 percent? Find the most conservative Value
Question 1(5 points) The design speed of a multilane highway is 60mil/hr, what is the minimum sight distance that sh...
Question 1(5 points) The design speed of a multilane highway is 60mil/hr, what is the minimum sight distance that should be provided on the road if (a) the road is level and (b) the road has a maximum grade of 4 percent? Find the most conservative Value
The Big-I in Albuquerque, NM has an exit ramp that takes southbound traffic eastwards. The ramp...
The Big-I in Albuquerque, NM has an exit ramp that takes southbound traffic eastwards. The ramp is a circular arc of radius 56.5 m, and banked at 32o. The posted speed is 45 mph, which allows a car to neither slide up nor down the incline. Show how to determine the coefficient of friction (kinetic or static?) between the road and the car tires. On an icy day when the coefficient of friction is 30% that of the dry road,...
A car travels at a constant speed of 32.5 mi/h (14.5 m/s) on a level circular...
A car travels at a constant speed of 32.5 mi/h (14.5 m/s) on a level circular turn of radius 49.0 m, as shown in the bird's-eye view in figure a. What minimum coefficient of static friction, μs, between the tires and the roadway will allow the car to make the circular turn without sliding? 1 ) make the circular turn without sliding? 2 ) At what maximum speed can a car negotiate a turn on a wet road with coefficient...
Transportation Engineering (25 points) As a junior roadway engineer, you have been asked to contr...
Transportation Engineering
(25 points) As a junior roadway engineer, you have been asked to
contribute to the design of a section of roadway that runs through
a national park. An endangered deer population has been identified
in the area and a wildlife underpass under a vertical curve has
been proposed, as shown in the figure below. An existing underpass
is perpendicular to the roadway at station 20+91.00 (not
necessarily under the center of the curve). The top of the
underpass...
1)A horizontal curve connects two tangents that deflect at an angle of 45o on a two...
1)A horizontal curve connects two tangents that deflect at an angle of 45o on a two lane rural collector highway. The point of intersection of the tangents is located at station (658 + 16.13). If the design speed of the highway is 70 km/h and max. allowable superelevation rate is used. Determine the length of curve, degree of curve, point of curvature, point of tangency, and the ordinates. 2)For the information given in question 1above, and if the highway enters...
6:47 1 4 Search <Back Hw#3-2019.doc 15- 10. A horizontal curve is designed for a two-lane road in mountainous terrain. The following data are known. Intersection angle: 40 degrees Tangent length: 436.76 feet Station of Pl: 2700+10.65 fs- 0.12 e- 0.08 Determine the following. (a) Design speed (b) Station of the PC (c) Station of the PT (d) Deflection angle and chord length to the first even 100 ft station. 15-11. A proposed highway has two tangents of bearings N...
NUMBER 8 ONLY
7. You are asked to design a horizontal curve with a 40-degree central angle for a two-lane road with 10-ft lanes. The design speed is 70mph, superelevation is 6%, and the coefficient of friction is 0.10. Determine the radius, degree of curvature, and the curve length. [8 points] 8. For the horizontal curve in the above problem, what distance must be cleared from the inside edge of the inside lane to provide adequate stopping distance? [6 points]
Help please I don't no how to do these
The curved section of a horizontal highway is a circular unbanked areof radius 760 m. If the coefficient of statiefriction between this roadway and typical tires is 0.40m, what would be the maximum safe driving speed for this horizontal curved section of highway? When a car goes around a banked circular curve at the proper speed for the banking angle, what force cause it to follow the circular path? gravity the...
9. When designing winding roads through the country-side, civil engineers need to take into consideration the maximum safe sideways acceleration (centripetal acceleration from friction) for rounding a turn is ac 1 m/s2. What is the minimum radius of the curve in the road if the maximum speed is 45 mph? (Ans: 404.7 m)
Question 1(5 points) The design speed of a multilane highway is 60mil/hr, what is the minimum sight distance that should be provided on the road if (a) the road is level and (b) the road has a maximum grade of 4 percent? Find the most conservative Value
Question 1(5 points) The design speed of a multilane highway is 60mil/hr, what is the minimum sight distance that should be provided on the road if (a) the road is level and (b) the road has a maximum grade of 4 percent? Find the most conservative Value
Transportation Engineering
(25 points) As a junior roadway engineer, you have been asked to
contribute to the design of a section of roadway that runs through
a national park. An endangered deer population has been identified
in the area and a wildlife underpass under a vertical curve has
been proposed, as shown in the figure below. An existing underpass
is perpendicular to the roadway at station 20+91.00 (not
necessarily under the center of the curve). The top of the
underpass...
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