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Traffic control devices
- 1. Subject : HighwayEngineering Subject Code:- 2150601
- 2. Prepared By: Deshmukh Bhavik151103106002 Kotila Jayveer 151103106008 Mistry Aditya 151103106009 Pandya Dhrumil 151103106010 Patel Nirmal 151103106012 Guided by: Assi. Prof. Rajan Lad Civil Engg. Dept. Assi. Prof. Mehul Gamit Civil Engg. Dept.
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- 4. The variousaids and devices used to control, regulate and guide traffic are: • Signs • Signals • Markings • Islands
- 5. Requirements of a TrafficControl Device Fulfill a need Command attention Convey a clear, simple meaning Command respect of road users Give adequate time for proper response
- 6. General Color Coding Yellow – general warning Red – stop or prohibition Green – Direction guidance Orange – construction and maintenance warning
- 7. Various trafficsigns have been recognised by the government of India through motor vehicle act, 1939. As per IRC, there are three types of traffic signs :- 1)Regulatory or Mandatory signs 2)Warning signs 3)Informatory signs
- 8. These aremeant to inform the road users of certain laws, regulations and prohibitions, the violation of the signs is a legal offence They are classified as:- 1. Stop and give way signs 2. Prohibitory signs 3. No parking or No stopping vehicles 4. Speed limit and vehicle control signs 5. Restriction end signs 6. Compulsary direction control signs
- 10. Warning signsare used to warn the road users of certain hazardous conditions that exists on the roadway. These signs are in the shape of equilateral triangle. They are having white background, red border and black symbols. The side of triangle is 45cm.
- 13. These signsare used to guide the road users along routes, inform them about destinations and distances and provide information to make travel easier, safe and pleasant. Various Informatory signs are: i. Direction and place identification signs ii. Facility information signs iii. Parking signs iv. Flood gauge
- 15. These areprovided at road intersections. These are control devices which could alternatively direct the traffic to stop proceed at intersections using red and green light signals automatically. The main requirement of traffic signals are to draw attention.
- 16. 1. Maintain orderlyflow of traffic. 2. Reduce certain types of accidents. 3. Improves safety and efficiency of movement of vehicles. 4. Pedestrians can cross the roads safety. 5. More economical than manual control. 6. Increase in speed along the major road traffic.
- 17. The rearand end collision may increase. Improper design and location of signals may lead to violations the control systems. Failure of the signal due to electrical power failure or any other defects may cause confusion to the road users.
- 18. 1. Traffic controlsignals a. Fixed time signals b. Manually operated signals c. Automatic signals 2. Pedestrain signals 3. Special signals
- 20. These arethe lines, patterns, words of other devices for control, warning and guidance or information of road users. Various types of markings are:- 1. Pavement markings 2. Kerb markings 3. Object markings 4. Reflector markings
- 21. These aregenerally be of white paint. Yellow colour marking are used to indicate parking restrictions.
- 22. Marking onthe kerb indicate certain regulations like parking regulations. Marking on the kerb and edges of islands with alternative black and white line increase the visibility from a long distance.
- 23. Physical obstructionon or near the roadway are hazardous and hence should be properly marked. Typical obstructions are signs and signals, traffic islands, narrow bridges, culvert.
- 24. These areused as hazard markers and guide markers for safe driving during night. These markers should be visible from a long distance of about 150 m.