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55.

Select the incorrect statement.

A.	Stop or red time of a signal is the sum of go and clearance intervals for the cross flow.	B.	Go or green time of a signal is the sum of stop and clearance intervals for the cross flow.
C.	Clearance time is generally 3 to 5 seconds.	D.	The cycle length is normally 40 to 60 seconds for two phase signals.

56.

Softening point of bitumen to be used for read construction at a place where maximum temperature is 40° C should be

A.	less-than 40°C	B.	greater than 40°C
C.	equal to 40°C	D.	none of the above

57.

Stopping sight distance is always

A.	less than overtaking sight distance	B.	equal to overtaking sight distance
C.	more than overtaking sight distance	D.	none of the above

58.

The absolute minimum radius of curve for safe operation for a speed of 110 kmph is

A.	110 m	B.	220 m
C.	440 m	D.	577 m

59.

The attainment of super elevation by rotation of pavement about the inner edge of the pavement

A.	is preferable in steep terrain	B.	results in balancing the earthwork
C.	avoids the drainage problem in flat terrain	D.	does not change the vertical alignment of road

60.

The background colour of the informatory sign board is

A.	red	B.	yellow
C.	green	D.	white

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