less than overtaking sight distance

equal to overtaking sight distance

more than overtaking sight distance

none of the above

increases with increase in speed

decreases with increase in speed

is same for all speeds

none of the above

30m

60m

120m

180m

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

60 kmph

80 kmph

100 kmph

120 kmph