(i) Allows continuous flow of liquids.
(ii) Reduces road accidents and carnage.
(iii) Reduces delays.
(iv) Less maintenance costs.
(v) Not affected by adverse weather.
(vi) Labour saving.
(vii) Environmental friendly.
(viii) Can be constructed in areas where it is difficult to construct roads.
maurice.mutuku answered the question on July 12, 2017 at 06:04
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