Assume that a 150-ft entry spiral will be used with the curve of Problem 24.7. Compute and tabulate curve notes to stake out the alignment from the TS to ST at full stations using a total station and the deflection-angle, total chord method.
Problem 24.7
A highway curve (arc definition) to the right, having R = 500 m and I = 18°30’, will be laid out by coordinates with a total station instrument setup at the PI. The PI station is XXXXXXXXXXm, and its coordinates are X = 75, XXXXXXXXXXm and Y = 36, XXXXXXXXXXm. The azimuth (from north) of the back tangent proceeding toward the PI is 48°17’12”. To orient the total station, a backsight will be made on a POT on the back tangent. Compute lengths and azimuths necessary to stake the curve at 30-m stations.