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On new and reconstructed pavement projects, the SHAs are encouraged to investigate the advantage of specifying that the shoulder be constructed of the same materials as the mainline, particularly on high-volume roadways. This will allow the shoulder to be used as a temporary detour lane during future rehabilitation or reconstruction. On urban freeways or expressways, strong consideration should be given to constructing the shoulder to the same structural section as the mainline pavement. Shoulders should be structurally capable of withstanding wheel loadings from encroaching truck traffic. The SHAs are encouraged to use paved shoulders where conditions warrant. Research results have shown that widening the right pavement lane and placing the edge stripe 0.5 m from the outside pavement edge significantly improves both asphalt and concrete pavement performance by providing edge support.

The SHA may use the design procedures outlined in the "AASHTO Guide for Design of Pavement Structures," or it may use other pavement design procedures that, based on past performance or research, are expected to produce satisfactory pavement designs. Instead, each State Highway Agency (SHA) is expected to use a design procedure that is appropriate for its conditions. Title 23 CFR 626 establishes the following requirement: "Pavements shall be designed to accommodate current and predicted traffic needs in a safe, durable, and cost-effective manner." The regulations do not specify the procedures to be followed to meet this requirement. You can learn from experts, build working projects, showcase skills to the world and grab the best jobs. You can enrol with friends and receive kits at your doorstep Skyfi Labs helps students learn practical skills by building real-world projects.

This step ensures that a viable design is generated, balancing risk while ensuring adequate funding rather than allowing the project cost to dictate the pavement design. Rigid pavements Factors which affect the selection of pavement typeĪ preliminary pavement design needs to be performed during the early phase of project development. Produce least noise from moving vehicles.Smooth surface to provide comfort to road users even at high speed.Adequate coefficient of friction to prevent skidding of vehicles.Structurally strong to withstand all types of stresses imposed upon it.Sufficient thickness to distribute the wheel load stresses to a safe value on the sub-grade soil.In India transportation system mainly is governed by Indian road congress (IRC) Requirements of a pavementĪn ideal pavement should meet the following requirements: This gives an overview of pavement types, layers and their functions, cost analysis.

Two types of pavements are generally recognized as serving this purpose, namely flexible pavements and rigid pavements. Construction Technology (Career Building Course) Looking to build projects on Civil Engineering?:Ĭivil Engineering Kit will be shipped to you and you can learn and build using tutorials.