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Maps displaying annual average daily traffic (AADT) and heavy commercial annual average daily traffic (HCAADT) as well as program information and GIS resources.
Maps depicting locations where truck highway traffic forecast have been completed. Maps show location, forecast number, and 20-year equivalent single axle
loads.
Breakdown of vehicle by classification. This includes maps and reports.
Data collected from continuous traffic counting stations located on interstates,
trunk highways county state-aid highways and municipal state-aid streets
at various locations throughout the state.
Meeting summaries, agendas, contact information and presentation material.
Various reports including: Monthly ATR Report, New Piezo Analysis Report, Determination of Seasonal Adjustment Factor Report, and Annual VMT Report.
Data collected from continuous traffic counting sites located on interstates, US routes, and Minnesota routes throughout the state. These sites collect data on vehicle volume, class, speed and weight.
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- What is AADT?
Annual average daily traffic (AADT) represents the total traffic that occurs in one year divided by 365.
- What is HCAADT?
It represents the total heavy commercial AADT that occurs in one year divided by 365.
- What is heavy commercial traffic?
It is all vehicles with at least two axles and at least six tires.
- What is combined directional count?
Data is collected by direction and then combined to get total traffic.
- What are the seasonal adjustment factors?
Seasonal adjustment factors are used to adjust short duration vehicle class counts to annual average daily volume. These factors adjust for day of week and month of year variations.
- What are ESAL factors?
An ESAL factor stands for an equivalent single axle load factor that represents the average effect of each vehicle type on the pavement, based on the equivalent load concept. The concept relates the effect axles in different configurations and magnitudes have on pavement performance as compared to the effect of single 18,000-pound axle.
- What's travel demand modeling?
Travel demand modeling uses information such as roadway and transit networks and population and employment data to forecast the expected demand for transportation facilities. There are four steps in travel demand forecasting: trip generation, trip distribution, modal choice, and trip assignment.
- What is an ATR?
ATRs, or Automatic Traffic Recorders, are loops in the pavement surface that continuously and automatically collect traffic volume data. There are currently 72 active sites on roads in Minnesota. More information can be found under the Automatic Traffic Recorder section.
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