What should be the design minimum acceleration lane length for a flat parallel-type entrance ramp/curve terminal with a design speed of 45mph connecting to a highway with a design speed of 70 mph at a grade separated interchange?
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What should be the design minimum acceleration lane length for a flat parallel-type entrance ramp/curve terminal with a design speed of 45mph connecting to a highway with a design speed of 70 mph at a grade separated interchange?
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- Subject : Transportation engineering Read the question carefully and give me clear solution. Remember given question is related to vertical curve not the horizontal curve. Compute the minimum length of vertical curve that will provide 190 m stopping sight distance for a design speed of 100 km/h at the intersection of a - 2.60% grade and a -2.40% grade.2. The existing posted speed limit on a section of highway is 55 mi/h and studies have shown that the current 85th percentile speed is 65 mi/h. If the poster speed limit is to be increased to the current 85th percentile speed, what should he the increase in the radius of a curve that is just adequate for the existing posted speed limit? Assume superelevation rate of 0.08 for the existing curve and for the redesigned curve.?55 mph roadway with two northbound through lanes (both are 11 feet in width) through an intersection. Beyond the intersection, the lanes merge into one lane. Please calculate the merge taper AND the distance the sign must be place AHEAD or upstream of the beginning of the merge. Pls hand written solution
- The 3 eastbound lanes of a rural freeway segment have 11 ft lane widths. There is a 3 ft lateral clearance on the right side of the road. There are no ramps within the influence area. What is the estimated FFS (mph)? Provide your answer to the nearest tenths.A developer has applied for a construction permit to build a supermarket at the southeast cornerof an intersection that is formed by a four-lane divided highway in the east-west direction and atwo-lane road in the north-south direction. Traffic on the two-lane road is controlled by a stop signat the intersection. The speed limit on the four-lane highway is 88 km/h. using the sight trianglerequirements at the intersection (Case B1), determine whether permission should be given for theconstruction if the following conditions exist. Provide a diagram for your solution.Major road lane width = 3.6 mMinor road lane width = 3.3 mMedian lane = 2.8 mDesign vehicle is a passenger carApproach grade = 2%Maximum feasible distance building from the center of the nearest lane of four-lane road = 5.4 mMaximum feasible distance building from the center of the nearest lane of two-lane road = 16.5 mWhat is the safe stopping distance for the rural freeway section with design speed 80 miles/hour at 4% incline?
- Subject : Transportation engineering Read the question carefully and give me right answer according to the options. what is the desirable superelevation that should be applied to a curve radius 124m, for a posted speed of 50km/h. Assume that this is a two-lane rural road that will be used by cars and trucks. a) 6.0% b) 5.8% c) 7.0% d)5.5%A minor 2-lane roadway with design speed of 45 mph crosses a major 2-lane roadway with design speed of 50 mph at 90 degree angle at an at-grade T-intersection. All lanes are 12 ft wide. If a stop sign is installed on the minor road, determine the dimensions ofallrequired clear sight triangles at this intersection for passenger cars(Case B, stop sign control on the minor road).an old dilapidated road having a curve portion is to be improved to accommodate a design of 72 kph. Super elevation is to be 0.07 and skid resistance is 0.16. Compute the radius of curve (m) to accommodate the design speed of 72 kph. Express your answer in whole number.
- A long segment of suburban freeway is to be designed on level terrain. The level segment, however, is followed by a 4.5% grade, 2.0 miles in length. If the DDHV is 2,500 vehicles per hour with 15% trucks (standard mix), how many lanes will be needed on the (A.) Upgrade, (B.) Downgrade, (C.) Level terrain segment to provide for level of service C? Lane widths and lateral clearances may be assumed to be 12 feet and 6 feet, respectively. Ramp density is expected to be 1.0 ramps per mile. The PHF is 0.92. Good weather, no incidents, no work zones, and regular users of the facility may be assumed.A temporary diversion has been constructed on a highway of -3% gradient due to major repairs that are being undertaken. Determine the speed limit that should be imposed on the diversion if drivers can see the sign inform ing them of the diversion at a distance of 400 ft from the diversion and the posted speed limit on the highway is 60 mph.traffic engineering - Q / A freeway is being designed to carry a heavy volume of 5000 veh / h on a regular weekday in rolling terrain . If the PHF is 0.9 and the traffic consists of 90 % passenger cars and 10 % trucks , determine the number of 12 - ft lanes required in each direction if the highway is to operate at level of service C. The free - flow speed is 70 mi / h , there is no lateral obstruction , and interchanges are 3 mi apart .