Civil Engineering - Highway Engineering - Discussion

1. Diamond Interchange:
Diamond interchanges are used where two highways cross with each other. It contains 4 legs of direct interchange ramps in 4 quadrants of the junctions as shown in the image below.

2. Trumpet Interchange:
Trumpet interchanges are constructed where one highway terminates at another highway as shown in the figure. It contains three legs at the end, two of them are direct interchange ramps and another one is a loop ramp which is a combination of semi-direct and indirect interchange ramps. This is also called as a three-leg interchange.

3. Cloverleaf Interchange:
Cloverleaf interchanges contain 4–legs and eight ramps. In each quadrant, one direct interchange ramp and one indirect interchange ramp is provided as shown in the figure. This type of interchange fulfils all the requirements for the complete separation of traffic. Cloverleaf interchanges are used at intersections where two major highways cross each other.

4. Partial Cloverleaf Interchange:
The partial cloverleaf interchange is the modification of the cloverleaf interchange. It also contains 4 legs but with fewer loop ramps than the cloverleaf interchange as shown below.

5. Rotary Interchange:
Rotary interchange is provided at circular junctions where traffic is permitted to flow in one direction around Central Island and one road axis is raised above the rotary intersection to allow grade separation.

6. Stack Interchange:
Stack interchange also called directional or free-flow interchange contains multiple levels of grade separations as shown in the figure.

What is delta, trumpet, diamond interchange?

Explain it.

What is trumpet? Explain.

A cloverleaf interchange is a two-level interchange in which left turns are handled by ramp roads. To go left, vehicles first continue as one road passes over or under the other, then exit right onto a one-way three-fourths loop ramp and merge onto the intersecting road.

@Janhavi.

Grade separator means changing in the gradient i.e. rise or fall of road surface.

Please explain other type of seperators.

Please, explain about other grade separators.

Traffic is moving at different level at the intersection such intersection is called as grade separated intersection.

Ex. Clover leaf intersection.

What is diamond interchange?

@ Shilpa.

Grade separation is the name given to a method of aligning a junction of two or more surface transport axes at different heights (grades) so that they will not disrupt the traffic flow on other transit routes when they cross each other.