Highway Engineering
Creep is the

Difference in level of two rails
Vertical movement of rail
Lateral movement of rail
Longitudinal movement of rail

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Highway Engineering
The effect of grade on safe overtaking sight distance is

to increase it on descending grades and to decrease it on ascending grades
to decrease it on descending grades and to increase it on ascending grades
to increase it on both descending and ascending grades
to decrease it on both descending and ascending grades

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