Page 99 - iRAD Training Manual IITM

iRAD Software Application – Training Manual

RBG Labs, IIT Madras

Ruling gradient - The gradient, which is
usually adopted while making the alignment of
the road, is known as the ruling gradient.

Limiting gradient - The gradient, which is
steeper than the ruling gradient, is known as
the limiting gradient. It is usually used in hilly
terrain and rolling terrain.

Minimum gradient - The minimum desirable
slope which is essential for the effective
drainage of rainwater from the surface of the
known as a minimum gradient.

Floating gradient The gradient on which a
motor vehicle moving with a constant speed
continues to descend with the same speed
without any application of power brakes is
called a floating gradient

Exceptional gradient: Exceptional gradients
are very steeper gradients given at
unavoidable situations

iRAD App Training Manual, April, 2021 Page 98