RT GEOMETRICS DESIGN
RT GEOMETRICS DESIGN SUR 4201
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This 1 page Class Notes was uploaded by Seth Mosciski on Saturday September 19, 2015. The Class Notes belongs to SUR 4201 at University of Florida taught by David Gibson in Fall. Since its upload, it has received 23 views. For similar materials see /class/207060/sur-4201-university-of-florida in Surveying & Related Areas at University of Florida.
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Date Created: 09/19/15
SUR 4201 Route Geometrics SR25 CASE Situation State Road 25 has specified Horizontal Vertical and Cross Section geometry as follows A Horizontal Speci cations 1 The first baseline tangent is to start at station 100000 and at Cartesian coordinates of 5000 ft North and 5000 ft East and proceeds 1000 feet at an azimuth of 85 degrees to the first point of intersection 2 The second route tangent de ects from the first 42 degrees to the left and has a total tangent length of 2000 feet to a second point of intersection 3 The third tangent de ects 32 degrees right and measures 1000 feet in total length to the End of Project point where the new baseline meets an existing road centerline of azimuth 75 degrees 4 Circular curves are to be placed at each point of intersection The radius of Curve 1 and Curve 2 are to be the same and equal to 1000 ft Vertical Specifications 5 The baseline is to have elevation 5800 feet at the project s beginning point station 1000 The first vertical tangent s percent grade must be 200 and run to a PVI at station 25 6 Run the second vertical tangent at 250 to a PVI at station 35 7 The final vertical tangent joins the last PVI with the project s end point which must be at elevation 5300 feet 8 Choose lengths of the two required vertical curves to have a K value of 200 feet Cross Section Specifications 9 The baseline is to be the centerline between two traffic lanes of 12 ft in width each crowned at 2 A 3 ft shoulder is to be provided on each side sloped at 5 to make sure water drains well Use 3l side slopes in cut or fill to original ground The pavement consists of 6 inches of asphalt on top of 12 inches lime rock base You are to exclude the area of pavement and rock from your earthwork calculations Construct cross sections at each 500 ft station 10 15 etc to End Project and use these to determine earthwork volumes When the project quottransitionsquot between cut and fill estimate the intermediate station of transition and use this for volume calculations Existing Ground Measurements 10 At each station point the land is exactly the same elevation for a considerable distance left and right of the baseline The existing ground along the baseline has the following elevations 1000 5200 ft 3000 4400 End Project 5200 l500 5000 3500 4600 2000 3900 4000 5800 2500 3400 4500 5000 In volume calculations also use end areas of zero area at your estimated transition stations between cutfill stations