Ssd & osd highway

The length visible to driver at any instance of time is called ___________

• Visibility limit

• Overtaking sight distance

• Sight distance

• Head light distance

The stopping sight distance of a vehicle moving with 45kmph and having a coefficient of friction as 0.4 is?

• 48m

• 49m

• 50m

• 51m

The stopping sight distance does not depend

• Break reaction time

• Friction

• Speed of vehicle

• Length of vehicle

The SSD is based on

• Speed of vehicle

• PIEV theory

• Voluntary action of brain

• Reflex action of brain

The reaction time considered in SSD is

• 1.5 s

• 2.5 s

• 3 s

• 2.2 s

The desirable relationship between OSD and length of overtaking zone is

• Length of overtaking zone = OSD

• Length of overtaking zone = 2 OSD

• Length of overtaking zone = 3 OSD

• Length of overtaking zone = 5 OSD

If the speed of overtaken vehicle is 80Kmph, then the design speed is

• 80kmph

• 100kmph

• 106kmph

• 96kmph

If the speed of overtaken vehicle is 50kmph then spacing of vehicles is

• 10m

• 12m

• 15m

• 16m

The reaction time of a driver assumed in OSD is

• 1 sec

• 2 sec

• 1.5 sec

• 2.5sec

The height of the driver above the road level is assumed as

• 1.1m

• 1.2m

• 1.5m

• 1.3m