To prevent movement of moisture from subgrade to road pavement on embankments about 0.6 m to 1 m higher than water table, the thickness of cut off layer of coarse sand used, is

Hill roads are

The ability of a driver to stop the vehicle moving with the designed speed, depends upon:

The convexity provided to the carriageway between the crown and edge of the pavement, is known as

During last phase of the reconnaissance, details of the grade line is recorded on 2 metre poles to indicate

Extra widening required at a horizontal curve on a single lane hill road of radiusm for a design speed ofkm ph and for a vehicle with wheel base 6.0 m is

In a braking test, a vehicle travelling atkm ph was stopped at a braking distance of 8.0 m. The average value of the vehicle's skid resistance (friction coefficient) is

If the radius of a main curve ism and length of the transition curve ism, the angle with tangent to locate the junction point, is

Roadway width for a National highways and State highways (two-lanes) is

The minimum superelevation in rolling terrain in plains, is limited to

The minimum width of the pavement of a National Highway should be

In welded wire mesh, the longitudinal wire is placed at

1.R.T.D.A. (Indian Roads and Transport Development Association) was set up at Bombay in

If the width of carriage way is 12.5 metres, outer edgecm higher than the inner edge, the required super elevation is

Super-elevation on roads in snow bound areas, should generally not exceed

Design of flexible pavement, involves

Non-passing sight distance along a road is the longest distance at which the driver of a moving vehicle, may see an obstacle on the pavement

The width of the right of way in urban area, is kept betweenm tom for

The statement, regarding the size of stones used at the wearing surface. "The size of a stone used on a road must be in due proportion to the space occupied by a wheel of ordinary dimensions on a smooth level surface. The point of contact will be found to be longitudinal about 2.5 cm and every piece of stone put into the road which exceeds 2.5 cm in any of its dimension is mischievious" was made by

For a poorly graded sub-grade soil, thickness of sub-base, is

To prevent compressive stresses in a rigid concrete pavement, the joint prvoided, is

Alignment of highways in hilly regions, is decided on

Concrete pavement is provided if daily traffic per lane exceeds

The normal road land width for a National or State highway, in open areas should be

If present A.D.T. isvehicles and annual increase is 10%, the average future flow after 5 years will be

Minimum radius of a simple circular curve deflecting through 5°, is

The distance travelled by revolving the wheel of a vehicle more than its circumferential movement, is known as

Traffic census is carried out for

If the radius of curvature of a hill road ism, the percentage grade compensation should be

The width of the right of way, is influenced by