A horizontal curve is to be designed to connect two tangents on a rural principal arterial with a design speed of 110 km/h. The station of the BC is 545+13.65. It is expected that an existing building will be located at a distance of 15 m from the centerline of the inside lane. Determine the minimum radius that will satisfy the sight distance and superelevation requirements.

A horizontal curve is to be designed to connect two tangents on a rural principal arterial with a design speed of 110 km/h. The station of the BC is 545+13.65. It is expected that an existing building will be located at a distance of 15 m from the centerline of the inside lane. Determine the minimum radius that will satisfy the sight distance and superelevation requirements.

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter15: Geometric Design Of Highway Facilities

Section: Chapter Questions

Problem 18P

See similar textbooks

Similar questions

Determine the minimum length of a vertical curve between a +1.48% grade and a +6.2% grade for a road with a 100 km/h design speed. The vehicle approaches the curve from the side of +1.48% grade. The vertical curve must provide the sufficient stopping sight distance and meet the appearance criteria. For stopping sight distance the both vehicle and object are located within the vertical curve. Consider a new road with a single carriageway in each direction, Rt=2.0s, d=0.36, h1=1.1m, h2=0.2m, height of headlight,h = 0.65m and q=1 degree.
A plus 5.0 percent grade intersects a minus 3.0 percent grade at station 4 + 10 and at an elevation of 460.60 ft. Given that a PVC station 3+00 is utilized. Determine the length of curve, PVT station, EPVC and EPVT?
A vehicle highway curve has an approach grade of -4% and the P.C is at station 11+00. The curve is to be 800 ft. long and the sag point is to be at station 16+00 of elevation 86.0 ft. Compute the grade of the forward tangent and locate the P.I.
Determine the minimum length of a vertical curve between a -1.78% grade and a -7.8% grade for a road with a 110 km/h design speed. The vehicle approaches the curve from the side of -1.78% grade. The vertical curve must provide the sufficient stopping sight distance and meet the appearance criteria. For stopping sight distance the both vehicle and object are located within the vertical curve. Consider a new road with a single carriageway in each direction, Rt=2.5s, d=0.29, h1=1.1m, h2=0.2m, height of headlight = 0.65m and q=1 degree.
A 3.5˚ curve is to be designed on a highway with a design speed of 60 mi/h. Spiral transition curves are to be used. Determine the length of the spiral and the appropriate stations for the T.S., S.C., and S.T. The angle of deflection for the original tangents is 40˚, and the P.I. is at station 15,100+26. The segment consists of two 12-ft lanes.
you are asked to design a horizontal curve with 40degrees celcious central angle for a two lane road with 3m lanes.The design speed is 120km/hr,side finishes is 0.11 and e is limited to 6% Calculate the radius and length of the curve that you would recommend
A +2.5% grade intersects with a –1.5% grade at station (53+524.25) at an elevation of 90 m. If the design speed is 90 km/h, use AASHTO (2011) criteria to determine: The minimum length of vertical curve using the rate of vertical curvature. The stations and elevations of the BVC and EVC. The elevation of each 20-m station. The station and elevation of the highpoint.
Determine the minimum length of a sag vertical curve between a -1.06% grade and + 2.1% for a road with 110 kph design speed. The vertical curve must provide 200 m sight distance
A simple circular curve exists with a degree of curve D = 12⁰and e = 0.08. A structure is proposed on land on the inside of curve. Assume the road is on level grade. Determine: (i) The radius of the curve (ii) The current maximum safe speed of the curve (iii) 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.
An equal-tangent crest vertical curve is 1100 ft long and connects a +2.5% and a -1.5% grade. If the design speed of the roadway is 85 mi/h, determine the length of curve, does this curve have adequate passing sight distance?
A tangent section of highway has a -1.0% grade and ends at station 4+75 and elevation 82 ft. It must be connected to another section of highway that has a -1% grade and that begins at station 44+12 and elevation 131.2 ft. The connecting alignment should consist of a sag curve, and be designed for a speed of 50 mi/h. What is the lowest grade possible for the constant-grade section that will complete this alignment?
You are asked to design a horizontal curve for a four-lane road. The road has 12-ft lanes. Due to expensive excavation, it is determined that a maximum of 42 ft can be cleared from the road’s centerline toward the inside lane to provide for stopping sight distance. Also, local guidelines dictate a maximum superelevation of 0.08 ft/ft. What is the highest possible design speed for this curve?