a) The driver of a vehicle travelling near the design speed is expected to see a minimum length of 160m of a 2-lane paved highway ahead as per the requirements of the Ghana Highway Authority Road Design Guide to enable him stop safely before reaching a hazard on the roadway. At a braking distance of 25m, what should be the driver’s reaction time in seconds to meet the aforesaid requirements?

b) Identify the key design controls and criteria used to specify the following geometric design parameters for roads in Ghana:

i.Design speed

ii.Maximum gradient

iii.Minimum vertical curve length

iv.Minimum vertical curve radius

v.Lane width

c) As a Highway Engineer tasked to evaluate the intersection design in Figure 3, do you think there is an error in the design? If so, then give recommendation(s) to rectify the error. (EV,5)

1. 

Transcribed Image Text:

A В To Suburb 2 D To Suburb 1 GH Figure 3: Intersection design Activate Windows To Suburb 3 olwle A В To Suburb 2 D To Suburb 1 GH Figure 3: Intersection design Activate Windows To Suburb 3 olwle

Answer rating: 100% (QA)

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