It is also provided on horizontal curve so as to provide a better night

It is also provided on horizontal curve so as to

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It is also provided on horizontal curve so as to provide a better night visibility of the curves under the head light of the vehicle.
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Guard rail
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Road margins Parking lane: These are provided on urban roads to allow kerb parking As far as possible only parallel parking should be allowed as it is safer for moving vehicle. It should have sufficient width say 3m Lay bay: These are provided near the public conveniences with guide map to enable driver to stop clear off the carriageway. It has 3m width,30m length with 15m end tapers on both sides. Bus bays: These may be provided by recessing the kerb to avoid conflict with moving traffic. It is located atleast 75m away from the intersection.
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Frontage road: These are provided to give access to properties along an important highway with control access to express way or free way It may run parallel to the highway and are isolated by separator. Driveway: It connect the highway with commercial establishment like fuel stations, service stations etc… It should be located away from the intersection. Cycle track: It provided in urban areas when the volume of cycle traffic on the road is very high. A minimum width of 2m is provided for cycle track. Footpath: These are provided in urban areas when the vehicular as well as pedestrian traffic are heavy. To protect the pedestrian and decrease accident. Minimum width of 1.5m is provided.
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Bus bays
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Frontage road
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c/s of highway in hilly area
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c/s of road in built-up area
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C/S of Flexible pavement C/S of Rigid pavement
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c/s of road in cutting
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Guard rails
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Bibliography Khanna , S. K., & Justo, C. E. G. “ Highway engineering”. Nem Chand & Bros. IRC Codes.
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Lecture -3 Sight Distance & Horizontal Alignment Civil Engineering Department College of Engineering and Technology(CET) Bhubaneswar TRANSPORTATION ENGINEERING-I PCCI4302
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SIGHT DISTNCE Sight distance available from a point is the actual distance along the road surface, which a driver from a specified height above the carriageway has visibility of stationary or moving objects. OR It is the length of road visible ahead to the driver at any instance.
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Types of sight distance Stopping or absolute minimum sight distance(SSD) Safe overtaking or passing sight distance (OSD) Safe sight distance for entering into uncontrolled intersection. Intermediate sight distance Head light sight distance
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Stopping sight distance: The minimum sight distance available on a highway at any spot should be of sufficient length to stop a vehicle traveling at design speed, safely without collision with any other obstruction. Over taking sight distance: The minimum distance open to the vision of the driver of a vehicle intending to overtake slow vehicle ahead with safety against the traffic of opposite direction is known as the minimum overtaking sight distance (OSD) or the safe passing sight distance.
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  • Spring '14
  • daniel
  • Science, Road, sight distance, IRC, road network, Central Road Fund

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