Because of the complex nature of PPRA’s calculator tools and features, we suggest viewing this page using a desktop computer or a tablet. Some features may be distorted or limited on mobile browsing.
Use the calculator below to discover and prioritize the roads in your network that offer the biggest payoff for the investment. To learn more about the calculations and the idea behind Cost-Benefit Value, click here.
Without investing in a pavement management system (PMS), you risk inaccuracy. The most effective way to prioritize projects is through a formal PMS.
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.
|A - Excellent||85-100|
|B - Good||70-84|
|C - Fair||55-69|
|D - Poor||40-54|
|F - Very Poor||0-39|
Annual Average daily traffic (abbreviated AADT) is traditionally the total volume of vehicle traffic of a highway or road for a year divided by 365 days. AADT is a useful and simple measurement of how busy the road is. Don’t know your AADT? See below for common ranges from the FHWA.
|Interstate||Other Freeways & Expressways||Other Principal Arterial||Minor Arterial||Major Collector||Minor Collector||Local|
|Rural||12,000 - 34,000||4,000 - 18,500||2,000 - 8,500||1,500 - 6,000||300 - 2,600||150 - 1,110||15 - 400|
|Urban||35,000 - 129,000||13,000 - 55,000||7,000 - 27,000||3,000 - 14,000||1,100 - 6,300||1,100 - 6,300||80 - 700|
NOTE: Many agencies learn their AADT using traffic counters, which can be moved to various locations during the year. Vehicle types and amount have a large influence on roadway deterioration, for example 1500 AADT with 25% truck traffic is much more severe than an AADT of 1500 with 5% truck traffic.
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.