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9. A road has an existng 600 m radius curve (A 30 degrees, no spiral) which...
25. A spiral curve with a length of 50 feet connects a tangent to a curve...
25. A spiral curve with a length of 50 feet connects a tangent to a curve having a radius of 100 feet. Deter- mine the offset from the tangent to the point where the spiral connects to the curve and the length of throw from the tangent. 26. Given a spiral curve with a length of 150 feet, which connects a tangent to a curve having a radius of 200 feet, determine the offsets from the tangent to the midpoint...
A developer is having a single-lane raceway constructed with a 120 mph design speed. A curve on the raceway has a radius of 1200 ft, a central angle of 30 degrees, and PI stationing at 1125+10. I...
A developer is having a single-lane raceway constructed with a 120 mph design speed. A curve on the raceway has a radius of 1200 ft, a central angle of 30 degrees, and PI stationing at 1125+10. If the design coefficient of side friction is 0.20, determine the superelevation required at design speed (do not ignore the normal component of the centripetal force). Also, compute the degree of curve, length of curve, and stationing of the PC and PT. 4.
A...
351 kg race car is rounding a curve in the road which is banked at an...
351 kg race car is rounding a curve in the road which is banked at an angle of 13.2 degrees from the horizontal. Assume that there has just been a massive snowfall and the road’s surface is frictionless. What must the radius of the curve be if the car is travelling at a speed 12.1 m/s and yet stays on the road?
A truck is taking a curve of radius of 200 m and sees the road sign...
A truck is taking a curve of radius of 200 m and sees the road sign which says on it “12.0 m/sec”. The coefficient of static friction is 0.3 such that the truck does not slide downwards. Find the angle that this curve has been designed to be. (Hint: from the expression for speed v, which we got in lecture for banked curves with friction, solve for angle θ)
curve of radius 250ft and e-0.08 is located at a section of an existing rural highway, which restrict the safe speed...
curve of radius 250ft and e-0.08 is located at a section of an existing rural highway, which restrict the safe speed at this section of the highway to 50 percent of the design speed. This drastic reduction of safe speed resulted in high accident rate at this section. To reduce the accident rate, a new alignment is to be designed with a horizontal curve. Determine the minimum radius of this curve if the safe speed should be increased to the...
2. A simple circular curve on a rural roadway is designed with a radius of 1500...
2. A simple circular curve on a rural roadway is designed with a radius of 1500 ft and a design speed of 55 mph. No spiral transition curve is to be used. The emax standard is 10%. The road has one lane per direction with 12-ft lanes and a 1% normal crown. (1.5 pts) a. Determine the design superelevation value (ed) and the corresponding lengths of superelevaion runoff (Lr) and tangent runout (Lt) (1.5 pts) b. Do a free-hand elevation...
1. Given the following horizontal curve and spiral data: Total tangent deflection angle (A) = 30°...
1. Given the following horizontal curve and spiral data: Total tangent deflection angle (A) = 30° Rt. D = 5° Design Speed = 50 mph Two lane road in Southern Climate PI Station @ 64+20.00 Find Land e from Table 13.8 or 13.9 (see handouts) Compute: As = Ac Y Xs es = R= P= TS Compute the stations of: T.S. = S.C. = C.S. = S.T. = Compute the Long Tangent and the Short Tangent Spiral Curve Equations Spiral...
A flat (unbanked) curve on a highway has a radius of 250 m
A flat (unbanked) curve on a highway has a radius of 250 m. A car successfully rounds the curve at a speed of 35 m/s but is on the verge of skidding out. a. Draw free body diagram of the car. b. If the coefficient of static friction between the car's tires and the road surface were reduced by a factor of 2, with what maximum speed could the car round the curve without slipping? c. Suppose the coefficient of friction were increased...
A flat (unbanked) curve on a highway has a radius of 240 m . A car...
A flat (unbanked) curve on a highway has a radius of 240 m . A car successfully rounds the curve at a speed of 37 m/s but is on the verge of skidding out. Part A If the coefficient of static friction between the car’s tires and the road surface were reduced by a factor of 2, with what maximum speed could the car round the curve? Express your answer in meters per second to two significant figures. part B...
1. Given the following horizontal curve and spiral data: Total tangent deflection angle (A) = 30°...
1. Given the following horizontal curve and spiral data: Total tangent deflection angle (A) = 30° Rt. D=50 Design Speed = 50 mph Two lane road in Southern Climate PI Station @ 64+20.00 Find and e from Table 13.8 or 13.9 (see handouts) Compute: R P= Compute the stations of: T.S. = S.C. = C.S. S.T. = Compute the Long Tangent and the Short Tangent PI 4 CPI To AC ST To S.C. C.S. SPI, SPI -Ls 20$ Cc 3...
25. A spiral curve with a length of 50 feet connects a tangent to a curve having a radius of 100 feet. Deter- mine the offset from the tangent to the point where the spiral connects to the curve and the length of throw from the tangent. 26. Given a spiral curve with a length of 150 feet, which connects a tangent to a curve having a radius of 200 feet, determine the offsets from the tangent to the midpoint...
A developer is having a single-lane raceway constructed with a 120 mph design speed. A curve on the raceway has a radius of 1200 ft, a central angle of 30 degrees, and PI stationing at 1125+10. If the design coefficient of side friction is 0.20, determine the superelevation required at design speed (do not ignore the normal component of the centripetal force). Also, compute the degree of curve, length of curve, and stationing of the PC and PT. 4.
A...
curve of radius 250ft and e-0.08 is located at a section of an existing rural highway, which restrict the safe speed at this section of the highway to 50 percent of the design speed. This drastic reduction of safe speed resulted in high accident rate at this section. To reduce the accident rate, a new alignment is to be designed with a horizontal curve. Determine the minimum radius of this curve if the safe speed should be increased to the...
2. A simple circular curve on a rural roadway is designed with a radius of 1500 ft and a design speed of 55 mph. No spiral transition curve is to be used. The emax standard is 10%. The road has one lane per direction with 12-ft lanes and a 1% normal crown. (1.5 pts) a. Determine the design superelevation value (ed) and the corresponding lengths of superelevaion runoff (Lr) and tangent runout (Lt) (1.5 pts) b. Do a free-hand elevation...
1. Given the following horizontal curve and spiral data: Total tangent deflection angle (A) = 30° Rt. D = 5° Design Speed = 50 mph Two lane road in Southern Climate PI Station @ 64+20.00 Find Land e from Table 13.8 or 13.9 (see handouts) Compute: As = Ac Y Xs es = R= P= TS Compute the stations of: T.S. = S.C. = C.S. = S.T. = Compute the Long Tangent and the Short Tangent Spiral Curve Equations Spiral...
1. Given the following horizontal curve and spiral data: Total tangent deflection angle (A) = 30° Rt. D=50 Design Speed = 50 mph Two lane road in Southern Climate PI Station @ 64+20.00 Find and e from Table 13.8 or 13.9 (see handouts) Compute: R P= Compute the stations of: T.S. = S.C. = C.S. S.T. = Compute the Long Tangent and the Short Tangent PI 4 CPI To AC ST To S.C. C.S. SPI, SPI -Ls 20$ Cc 3...
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