+4.5% grade on rural free way intersects with a-2.5% grade at chainage of 67+500 at an elevation 75.00. If the design speed of free way us 100km/hr. N.b obtain the value of (k) from the following table # determine the chainage and elevation of the Bvc, Evc and the lowest point #if the road is stacked at 50m interval, calculate the elevations of all full chainage a long the curve. Table.

+4.5% grade on rural free way intersects with a-2.5% grade at chainage of 67+500 at an elevation 75.00. If the design speed of free way us 100km/hr. N.b obtain the value of (k) from the following table # determine the chainage and elevation of the Bvc, Evc and the lowest point #if the road is stacked at 50m interval, calculate the elevations of all full chainage a long the curve. Table.

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 25P

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Question

1. A+4.5% grade on rural free way intersects with a-2.5% grade at chainage of 67+500 at an elevation 75.00. If the design speed of free way us 100km/hr.

N.b obtain the value of (k) from the following table

# determine the chainage and elevation of the Bvc, Evc and the lowest point

#if the road is stacked at 50m interval, calculate the elevations of all full chainage a long the curve.

Table.

minimum value of k for vertical curve.

Design speed	crest value	sag value
40	6	8
50	11	12
60	16	16
70	23	20
80	33	25
90	46	31
100	60	36
110	81	43
120	110	52
130	133	57

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