INTERSECTIONS IN TRAFFIC ENGINEERING
- 1. Name: S.JAGADEESH PRASAD Roll: 315126508065 Civil ¾ ANITS
- 2. CONTENTS:- What is traffic engineering? Road Intersections Factors to be considered in design of intersections Types of road intersections At grade intersection Grade separated intersection Traffic Islands Types of traffic Islands Conclusion
- 3. What is traffic engineering? Traffic engineering is a branch of civil engineering that uses engineering techniques to achieve the safe and efficient movement of people and goods on roadways.
- 4. ROAD INTERSECTIONS: When two or more roads intersect each other, it is called Intersections or Road Junction. Road intersections should be designed to provide safety to road users and free flow of traffic.
- 5. Factors to be considered in design of Intersections 1. Accidents should be reduced. 2. Sufficient visibility should be ensured for vehicles. 3. Adequate lighting should be provided during night. 4. Proper signs, guard rails, traffic islands should be provided. 5. Proper pedestrian crossing should be provided. 6. Free flow of traffic is allowed at design speed.
- 6. Road intersections At grade intersections Grade separated intersection Un channelised channelised
- 7. An intersection is a junction where two or more roads meet or cross. Roads that cross each other at the same level or elevation are called At grade Intersections. At Grade intersection … They are classified into two types. They are: 1. Un Channelised 2. Channelised
- 8. Un- Channelised At Grade Intersections… These are At-grade intersections without islands for directing traffic into definite paths. These are simple in design and dangerous in traffic operations. These are classified into :- a. Square junction b. Skew junction or Acute junction c. T- junction d. Y- junction e. Multiple junction
- 9. Square junction Skew junction (or) Acute junction
- 12. Channelised At Grade Intersections… At these intersections islands are introduced to reduce the total conflict area available. These islands are useful to channelise the turning traffic, to control the speed and angle of approach.
- 13. Different Types Of Grade Separated Intersections Are:-
- 14. 1. Round about interchange When two or more roads meet at a point round about is to be provided. At the round about a highway is crossed at a level called round about interchange. There is no disturbance to the highway traffic.
- 15. 2. Flyover… In grade separation interchange, the intersecting Roadways are placed at a different elevations to allow uninterrupted traffic movement. In a fly over the roads of major importance are taken over the roads of lesser importance.
- 16. 3. Diamond Intersection It is used when heavily traffic road crosses the less traffic road. It has 4 one way ramps. It requires more right of way and proved to be of less expensive of all other interchanges. In this crossing, vehicles cross each other one above the other and one who wants to turn will stop and make merging or diverging.
- 17. 4. Clover Leaf Junction… 0 It is to be provided when two high speed roads meet at right angles and when the vehicular traffic is more than 5000 vehicles per hour. In this junction high speed is achieved, right hand movements are eliminated in order to reduce accidents. 0 This requires no traffic signals or no traffic police but more place.
- 18. TRAFFIC ISLANDS When two or more roads of equal importance intersect at a point traffic islands were introduced and all vehicles are compelled to move along the same direction only. There are different types of traffic islands. They are :- 1. Circular islands 2. Turbine Island 3. Rhombus Islands 4. Tangent Island
- 19. Circular islands Turbine Island Rhombus Islands Tangent Island
- 20. Conclusion I would like to conclude that this section is about effective usage of traffic intersections and islands is very important in controlling the rate of traffic.