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1. Welcome to our presentation
Topic: Comparison of Reinforced Concrete and
Prestressed Concrete
Group: 03
Presented By:
1) Md. Estiak Hossain; (ID: 163-47-282)
2) Razu Ahmmed ; (ID:163-47-272)
3) Uzma Akter ; (ID:163-47-276)
4) Md. Toukir Sarker;(ID:163-47-273)
5) Menhajul Absar Refat; (ID:163-47-275)
6) Md. Rabiul Islam; (ID:163-47-286)
7) Shahriar Abdullah; ID:163-47-302)
Department of Civil Engineering

2. • What is a Trumpet
Interchange ?
A Trumpet interchange is a road
junction that typically uses grade
separation, and one or more looped
ramps, to permit traffic on at least one
highway to pass through the junction
without directly crossing any other
traffic stream.
About Trumpet Interchange
Trumpet interchanges have been used where
one highway terminates at another highway.
These involve at least one loop ramp
connecting traffic either entering or leaving
the terminating expressway with the far lanes
of the continuous highway.

3.  The primary purpose of an interchange is to reduce conflicts caused by vehicle
crossings and minimize conflicting left-turn movements.
 Provide interchanges on all Interstate highways and freeways, and at other
locations where traffic cannot be controlled efficiently by intersections at grade.
 To ensure non-stop vehicle flow.
 To reduce accidents.

4. SOME PHOTOS

5. ADVANTAGE
Low construction cost comparable to other interchanges.
Less of an eyesore for local residents.
 weaving is also eliminated.
Reduce accidents.
Comfortable for road users.
No need traffic signal lights.

6. DISADVANTAGE
Require a lot of land
to construct.
The loop ramps are
not as efficient as
flyover/under ramps in
terms of traffic flow.

7. Limitations in Bangladesh
• There is not enough land to built a trumpet in capital city of
Bangladesh though Dhaka is the most traffic conflicted area.
• Right side trumpet is less useful because all our roads are left
side drive road.
• Mini loop has less radius of curve but greater slope what is
harder to use as a entrance and causes low speed.

8. CONCLUTION
Traffic intersections are problem spots on any highway, which
contribute to a large share of accidents. For safe operation,
these locations should be kept under some level of control
depending upon the traffic quantity and behavior. Based on
this, intersections and interchanges are constructed.