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How to Evaluate Whether or Not to Pave a Gravel Road (When to Pave a Gravel Road). Rodger Young, P.E. Director of Technical Services. Presented at 30 th Annual Asphalt Conference And Equipment Show. What is meant by a “paved” road Light chip seal ? Double chip seal ? 2-in. HMA mat ?

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how to evaluate whether or not to pave a gravel road when to pave a gravel road
How to EvaluateWhether or Notto Pave a Gravel Road(When to Pave a Gravel Road)

Rodger Young, P.E.

Director of Technical Services

Presented at

30th Annual Asphalt Conference

And Equipment Show

slide2
What is meant by a “paved” road
    • Light chip seal ?
    • Double chip seal ?
    • 2-in. HMA mat ?
    • 4-in. HMA mat ?
  • Generally HMA mats < 2-in. have little real load-bearing capacity of their own.
slide3
What is meant by a paved road ?
    • Asphalt Institute refers to a paved road as one that has a HMA mat of ≥ 4-in. of full depth asphalt or 3-in. + suitable granular base.
    • System that has load bearing capacity.
  • Surface-treated road
    • A roadway with < 2-in. HMA mat.
    • Protects the base material by shedding water and providing a smooth riding surface.
slide4
Decision to paved
    • Paving helps to seal the surface from moisture and protects the base and subgrade material,
    • Eliminates dust problems
    • Smoothness - Has higher user acceptance
    • Accommodate many types of vehicles that do not operate as effectively on unsurfaced roads.
    • Matter of trade-offs
    • Maintenance - Properly maintained, a gravel road can serve general traffic adequately for many years
slide5
Considerations for paving gravel roads
    • Local agencies considering paving roadways
      • reducing roadway maintenance cost,
      • providing a smooth riding surface
      • eliminating environmental (dust) problems.
    • Local agencies should have a policy and criteria for paving gravel roads.
slide6
An approach for determining whether or not a roadway should be paved.

Roadway management program.

Goal of the management program is to improve all roads by using good management practices

Common sense system, step-by-step approach to scheduling and budgeting for maintenance work

Establishes short-term and long-term maintenance goals, prioritizes projects within budget constraints

slide7
An approach for determining whether or not a roadway should be paved.
    • Roadway management program.
      • Roadway inventory
      • Roadway condition survey
      • Determine appropriate treatments
      • Establishes costs
      • Sets priorities
slide8
An approach for determining whether or not a roadway should be paved.
    • Commitment to effective management
      • Matter of making sure taxpayer’s money is well spent
      • Planning for 5 or even 10 years instead of putting a band-aid on today’s problem
      • Using good management techniques instead of “seat of the pants” methods
      • Taking time todo things right the first timeand constructing projects to last
slide9
An approach for determining whether or not a roadway should be paved.
    • Traffic conditions and usage – life and maintenance requirements of a roadway is affected by the number of vehicles and their weight
      • Establishing traffic volumes and type of traffic for when to pave
      • Establishing functional importance of the roadway
      • Establishing design and construction standards
      • Establishing maintenance standards
      • Roadway safety
slide10
An approach for determining if a roadway should be paved con’t.
    • Economic evaluation
      • Determining when it is more economical to pave than leave the roadway a gravel surface
        • Life cycle cost of the options