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Gravel Roads: Maintenance and Design Manual (7 credit hours)
The United States has over 1.6 million miles of gravel roads, amounting to about 53% of total road mileage.  Gravel roads are usually considered greatly inferior to paved roads, but in many rural regions the volume of traffic is so low that paving and maintaining a paved road is not economically feasible.  Yet gravel roads serve important functions: providing a means of getting agricultural products in and out of farm fields, timber out of forests, or providing access to remote areas such as campgrounds and lakes. Many gravel roads serve rural residents as well.  Given the importance of gravel roads to the economy, especially of rural areas, engineers must understand maintenance and design issues associated with gravel roads.  The purpose of this 7 hour course is to provide clear and practical information on the maintenance of gravel roads.  The course material includes many photographs of existing roads that show examples of both good and poor practices in maintenance and design and will provide a) detailed design methods for determining gravel road thickness, b) an example of a worksheet for gradation and plastic index determination, c) charts for quantity calculations, d) a guide for deciding if a gravel road should be converted to a paved road, and e) a checklist for motor grader maintenance. 
US Department of Transportation
This course teaches the following specific knowledge and skills:
  • Students will learn about proper road cross section shape: crown, shoulder, and foreslope.
  • Students will understand techniques for rehabilitation of deteriorated road.
  • Students will be able to apply principles of drainage based on ditches, culverts, and underdrains.
  • Students will learn about corrugation (washboarding), intersections, superelevation in curves, rail crossings, soft and weak subgrade.
  • Students will become knowledgeable about the selection of gravel, the need to avoid segregation and to test aggregates.
  • Students will learn how to follow the AASHTO method and the design catalog approach for determining gravel road thickness.
  • Students will be able to decide when to pave a gravel road.
  • Students will become familiar with the use of a worksheet for gradation and plastic index determination.
  • Students will be able to use charts for quantity calculations.
  • Students will understand the requirements for maintaining a motor grader.
Titan Continuing Education, Inc. | 1519 Dale Mabry Hwy, Ste 201 Lutz, FL 33548 | Toll Free: 800.960.8858 | Email: info@TitanCE.com .