Proper pavement design is an integral part of ensuring that new and existing pavements are long-lasting. Existing asphalt and concrete pavement will be evaluated for cost and estimated costs for replacement, patching, or overlaying.

The first step of almost any part of civil engineering projects is a site investigation, and pavement design is no different. Jesik Consulting will conduct an assessment of both the current and expected traffic requirements. We will take into account the cost and safety factors. Since pavement design falls under the oversight of a local or state jurisdiction, or Federal Highway Administration, we will comply with any and all directives as to concrete and asphalt mix.

Pavement design is done based on the results of specific sub-grade characteristics. The combination of asphalt mix is evaluated in our laboratory to meet any procedures adopted by governing entities such as the Department of Transportation, Federal Aviation Association, Asphalt Institute, or AASHTO.

Once the subgrade is evaluated, we can determine the thickness required for the project. Considerations for this include the material properties, they type of traffic expected on that road, the life of the design, and effective drainage. This evaluation will be based on recommendations from a site investigation to determine the existing conditions. Regulatory requirements are incorporated into our recommendations every step of the way.

Once all testing and evaluations are complete, we will present you with options for your custom pavement design. These will include sections of full-thickness pavement as well as sections of composite pavement.

Pavement Design Factors

There are six pavement design factors that need to have careful attention paid to them.

  1. Traffic needs to be considered as to the weight of the vehicles that will be traveling over the road when it is complete. There is a difference in the composition of a road that will have 18-wheelers running over it as opposed to a road that will only see passenger vehicles.
  2. The foundation needs to be uniform and moisture and frost resistant. Careful attention needs to be paid to the uniformity of the subgrade and stiffness of the subgrade layers. For example, some of the subgrades might be fine silt or clay. The foundation for a road built on top of those layers would be quite different from more rigid subgrade. The next most important factor of the foundation is drainage. There needs to be adequate subsurface drainage.
  3. Shoulder structure. When possible, the shoulder should be paved.
  4. The engineering economic analysis applies to both new and rehabilitated roads. The economic analysis should include recommendations for alternative strategies and materials and will be evaluated based on the needs of the system.
  5. Rehabilitation projects need to be designed with a focus on economic factors. Rehabilitated roadways need to provide the best possible return for the money spent on the project. It will be compared as to whether it needs to be redone or whether simple repairs will be sound in relation to the existing structure.
  6. The safety of the new road is an important aspect. Surfaces of any size project should always be skid resistant. Materials, mixes, and techniques should be evaluated so that the appropriate skid resistant surface will last for the expected lifetime of the road.
  7. Pavement design services are an important aspect of any project, no matter the size.