Sag curves do not present any problems of sight distance during the hours of daylight or on well-lit streets at night. The minimum curvat...

-It is defined as the rate of rising or falls along the length of the road w.r.t the horizontal. -It is expressed as a ratio of 1 in x ...

It is the slope provided to the road surface in the transverse direction to drain off the rain water from the road surface. Drainage an...

It is vertical curves with upwards gradient. They are formed when two gradients meet as illustrated in any of the following four ways: ...

Land width is the width of land acquired for the road, along its alignment. It should be adequate to accommodate all the cross-sectional ...

According to PIEV theory the total reaction time of the driver is split into 4 parts namely time taken by the driver for (i) Perception...

  When a vehicle negotiates a curved path, it is subjected to an outward force known as centrifugal force. To resist this force, the outer e...

At road-stretches where required OSD cannot be provided, as far as possible ‘Intermediate Sight Distance’, ISD equal to twice SSD may be ...

The overtaking sight distance is the minimum distance open to the vision of the driver of a vehicle intending to overtake the slow vehicle ...

Safe stopping sight distance, SSD for the design speed is the absolute minimum sight distance. This particular sight distance traveled du...

  Road geometry affects the sight distance available to the driver. Sight distance in the context of road design is defined as “the length o...

It is of crucial importance in highway design, is the traffic data both current and future estimates. Traffic volume indicates the level of...

-Geometric design of highways deals with the layout and dimensions of visible features of the highway such as horizontal and vertica...