number 1 and 2 Asterisks (*) indicate problems that have partial answers given i

Question

number 1 and 2 Asterisks (*) indicate problems that have partial answers given in Appendix G. 25.1 What is the advantage of using a parabola in the vertical design of highways and railroads? 25.2 What factors must be taken into account when designing a grade line on any highway or railroad? Tabulate station elevations for an equal tangent parabolic curve for the data given in Problems 25.3 through 25.9 and check the table by second differences. 25.3 A + 2.50% grade meets a -1.75% grade at station 44+25 and elevation 386.96 ft, 400 ft curve , stakeout at half stations. 25.4 A-3.00% grade meets a+2.50% grade at station 4+200 and 200 and elevation 105.568 m,

Explanation / Answer

1) vertical curves are used to provide a gradual change from one road slope to another , so that vehicles may smoothly navigate grade change as they travel and also provide good drainage facilities

2) right of side , shoulder , cerbs and abutments

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