Used to measure the total length and lane count of a given road. Lane-Miles are calculated by multiplying centerline mileage by the number of lanes.

Example: A four-mile stretch of a six-lane highway has 24 lane-miles.

Many agencies constrain traffic so that AADT doesn't disproportionately influence the Cost-Benefit Value Comparison. Constraint factors typically vary from 4 to 10, depending on network characteristics.

Pavement Condition Index (PCI) is one of many scales used to indicate the general condition of a pavement. PCI is evaluated based on inspection and observation and must account for both the severity and extent of pavement distress. Throughout the PPRA site, we’ve used the following scale. Knowing the condition of your network is the first step in improving overall network condition and many manual and automated methods exist. If you’re unsure of your road’s PCI, please visit our photo gallery of roads at varying levels of distress to gain a general idea.

The time it takes a pavement to return to the condition rating it had just prior to a treatment application. For example, before a treatment was applied, if a pavement was rated as a 60 PCI and it took 5 years to drop back to a 60 PCI, it can be said that the treatment provided 5 years of life extension.

The life extension of a given treatment varies greatly depending on roadway condition, quality of treatment, climate, and a number of other factors. Additionally, there are many best practices road owners can implement to achieve better than average life extension.

To provide conservative estimates, all calculator tools throughout the site use the median range of average performance. See the Expectations section of the Treatment Resource Center for detailed Life Extension information on each treatment, and visit the Best Practice section to learn how to maximize the life of each treatment.

Create a profile on RoadResource.org to enter and maintain information on cost, unit of measure, and life extension that is relevant to you. Once entered, this data will automatically populate the features of the site using your information.

Displayed costs are the result of a US and Canada cost survey conducted by an impartial third party. Localized costs vary greatly based on materials, labor, location and other factors. Replace pre-populated data with your local costs to make these tools more relevant or contact a contractor/supplier for a quote or for more locally relevant information.

Create a profile on RoadResource.org to enter and maintain information on cost, unit of measure, and life extension that is relevant to you. Once entered, this data will automatically populate the features of the site using your information. Note: Your data will not be reviewed or used by PPRA or any of its members and affiliates, nor will it be shared with external organizations.

Where does this segment begin? (ie, "First street" or Mile 37)

Where does this segment end? (ie, Fourth Street or Mile 40)

Total width of pavement across all lanes. This measurement should include only pavement that will be addressed by the project. Consider shoulders and multi-lane segments.

Inputs in the Number of Lanes section of the calculator do not factor into or impact the calculation of Segment Cost or Cumulative Cost.

• Enter total network lane-miles in the top left box and total annual budget in the top right.
• Enter 1 segment of road for each row, including:
  • Road name
  • From/to: the beginning and end point of the road segment
  • PCI: Pavement Condition, and AADT: Annualized Average Daily Traffic (if you don’t know this information, click the question mark icon to explore)
  • Length and width of each segment
• Use auto-populated average cost and life extension data, or enter your own data in place. Create a user profile to auto-fill your data throughout the site.
• Select an AADT constraint, or “dampening factor” -- this will constrain the impact of daily traffic on the CBV formula, which may otherwise disproportionately impact the results.
• Segment cost and cumulative cost will calculate and your budget line will adjust to reveal the number of treatments you can accomplish under this plan, according to your current budget.
• Click “add row” to add new roads.
• Compare a Worst-First to a CBV Approach by clicking the buttons below. Road segments will reorder according to these plans.
• Click the question mark icons to learn more about each input.