Principles of Highway Engineering and Traffic Analysi (NEW!!)
6th Edition
ISBN: 9781119305026
Author: Fred L. Mannering, Scott S. Washburn
Publisher: WILEY
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Question
Chapter 3, Problem 66P
To determine
The required stopping sight distance.
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A 4-lane divided highway has a highway grade of -1.5%. The minor road approach grade is 3.5%. The design speed is 45 mph for the major road and 40 mph for the minor road. Find the left turn departure sight distance for a passenger car turning left from the minor road to the major road,
The answer should be in feet.
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)?
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A large grain elevator is located 40 feet from the centerline of a two-lane highway (55 mph speed
limit, 12-ft lanes and level terrain). The elevator is situated on the inside of a horizontal curve
with a radius of 500 feet measured to the centerline of the highway. Assuming that the elevator
is the only sight restriction on the curve, what is the available sight distance along the curve
(measured to the center of the inside lane)? Does adequate stopping sight distance exist?
Chapter 3 Solutions
Principles of Highway Engineering and Traffic Analysi (NEW!!)
Ch. 3 - Prob. 1PCh. 3 - Prob. 2PCh. 3 - Prob. 3PCh. 3 - Prob. 4PCh. 3 - Prob. 5PCh. 3 - Prob. 6PCh. 3 - Prob. 7PCh. 3 - Prob. 8PCh. 3 - Prob. 9PCh. 3 - Prob. 10P
Ch. 3 - Prob. 11PCh. 3 - Prob. 12PCh. 3 - Prob. 13PCh. 3 - Prob. 14PCh. 3 - Prob. 15PCh. 3 - Prob. 16PCh. 3 - Prob. 17PCh. 3 - Prob. 18PCh. 3 - Prob. 19PCh. 3 - Prob. 20PCh. 3 - Prob. 21PCh. 3 - Prob. 22PCh. 3 - Prob. 23PCh. 3 - Prob. 24PCh. 3 - Prob. 25PCh. 3 - Prob. 26PCh. 3 - Prob. 27PCh. 3 - Prob. 28PCh. 3 - Prob. 29PCh. 3 - Prob. 30PCh. 3 - Prob. 31PCh. 3 - Prob. 32PCh. 3 - Prob. 33PCh. 3 - Prob. 34PCh. 3 - Prob. 35PCh. 3 - Prob. 36PCh. 3 - Prob. 37PCh. 3 - Prob. 38PCh. 3 - Prob. 39PCh. 3 - Prob. 40PCh. 3 - Prob. 41PCh. 3 - Prob. 42PCh. 3 - Prob. 43PCh. 3 - Prob. 44PCh. 3 - Prob. 45PCh. 3 - Prob. 46PCh. 3 - Prob. 47PCh. 3 - Prob. 48PCh. 3 - Prob. 49PCh. 3 - Prob. 50PCh. 3 - Prob. 51PCh. 3 - Prob. 52PCh. 3 - Prob. 53PCh. 3 - Prob. 54PCh. 3 - Prob. 55PCh. 3 - Prob. 56PCh. 3 - Prob. 57PCh. 3 - Prob. 58PCh. 3 - Prob. 59PCh. 3 - Prob. 60PCh. 3 - Prob. 61PCh. 3 - Prob. 62PCh. 3 - Prob. 63PCh. 3 - Prob. 64PCh. 3 - Prob. 65PCh. 3 - Prob. 66PCh. 3 - Prob. 67P
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- A driver of a car applied the brakes and barely avoided hitting an obstacle on the roadway. The vehicle left skid marks of 26 m. (Assume f-0.6) determine whether the driver was in violation of the 70 km/hr speed limit at the location if he was travelling : a/ uphill on a 3° incline or, b/ downhill on a 3º incline.arrow_forwardAt what angle should a highway curve of 610-ft diameter be banked to accommodatecars travelling at 105 mph? The coefficient of friction between the tires and the road is0.55. What is the rated speed of the curve?arrow_forwardEx. A driver of a car applied the brakes and barely avoided hitting an obstacle on the roadway. The vehicle left skid marks of 26 m. (Assume f=0.6) determine whether the driver was in violation of the 70 km/hr speed limit at the location if he b/ downhill on a 3º incline. was travelling: a/ uphill on a 3º incline or,arrow_forward
- QUESTION 5 Calculate the horizontal sight line offset (ft) for a curve with a radius of 600 ft and a design speed of 40 mph. QUESTION 6 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 first deflection angle (degrees) (i.e. the angle subtended by the roadway between the PC and the first full station)?arrow_forwardThe design speed of a multilane highway is 60 mi/h. What is the minimum stopping 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%? Assume the perception-reaction time = 2.5 sec.arrow_forwardA 4 lane divided highway with a 12 feet median has a highway grade of -1.5%. The minor road approach grade is 3.5%. The design speed is 45 mph for the major road and 40 mph for the minor road. Find the right turn departure sight distance for a passenger car taking a right turn from the minor road to the major road. Answer should be in feet.arrow_forward
- Qg:- A horizontal curve with a radius of 200 m forms part of a two-lane highway with a posted speed of 50 Kph. Determine: 1)) The distance a house can be placed from the centerline of the inside of the curve without reduced the required stopping sight distance? 2)) Length of circular curve ? Assume perception reaction time is 2.5 sec., the highway is flat, lane width = 4 m, and central angle A = 25°.arrow_forwardQ2/ A track traveling at 25mph is approaching a stop sign. At time to and a distance of 60 ft the track begins to slow down by decelerating at 14 ft/sec? .do you think the track be able to stop in time. 56.7 ft 48.02 ft 67.7 ft 43 ftarrow_forwardA 2 lane highway with a grade of 6% has a posted speed limit of 50 mph and a design speed of 55mph. The minor road approach grade is -1.5%. Find the left turn departure sight distances for a passenger car taking a left turn from the minor road to the major road. Answer should be in feet.arrow_forward
- Q2) A 5° curve is being designed for a four 12 ft lanes highway with a design speed of 75 mi/h. The highway located within +2, and -5 % vertical alignment, and driver reaction time will be taken as 2.5 s. What is the closest any roadside object may be placed to the centerline of the inside lane of the roadway? s? – S} 30(0.348 F 0.01G) 5729.58 ds = 1.47 * S; t+ D = R 28.65 ds d,D' 1- cos 200 5729.58 M = M = R1 - cos Rarrow_forwardQ2/ After a rural road way deflect by an angle of 44°. The two tangents intersect at station (35+70). 1- Find the tangent and curve lengths for a 5° curve 2- Recommended a superelevation rate if the design speed is 100 km/hr and the coefficient of side friction is 0.12. 3- What is the clearance distance required for an obstruction near the road if the acceleration rate is 4 m/sec? ?arrow_forwardH₁ - PC + Question 6 a) With regards to the relationship between the sight distance and the length curve as established in Figure 2, determine the minimum length of the curve if the hazard is assumed to be at a height from the road surface equal to the eye height of the driver. Note that the driver's eye height is an average height and the algebraic difference in grades is in decimal form. Stopping sight distance A O PT H₂ Length of curve Figure 2: Sight distance and curve length relationarrow_forward
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