Average Annual Daily Traffic

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Average Annual Daily Traffic
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Average Annual Daily Traffic

• The number of vehicles crossing one location on a
  roadway
• Taken once a year

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Counters near Cuero, Texas

• Two permanent counters near Cuero, Texas

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Raw data is collected

• Hand Counters
• Tube Counters
• Permanent Counters

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Tube counter
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Permanent counter near Cuero, Texas
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Wires are buried in the pavement
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Data is adjusted for type of vehicle
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Data is adjusted for type of vehicle

• Tube counter shows 2200 axles
• Permanent counter shows 1000 vehicles
• Tube counters must be divided by 2.2

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Data is adjusted for time of year

• Permanent counter shows 1000 vehicles
• Permanent counter usually averages 500 vehicles
• Tube counters must be divided by 2

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How is the data used?

• To decide where to build new roads
• To decide where to improve existing roads

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How is the data used?

• To predict future use of roads

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How is the data used?

• To distribute state and federal funding.

• To help people decide where to build hotels, gas
  stations, etc.

• To decide where to put billboards

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How is the data used?

• Where would you build your new convenience store?

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1948 1997
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Now its your turn

• Use the maps from 1950 to 1999
• Predict the amount of traffic
• Revise and evaluate your predictions
• Apply the data to make decisions

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• Our thanks to Mr. Paul Frerich and the Yoakum
  District Office of
• the Texas Department of Transportation

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• This project was developed by Yoakum I.S.D. as a
  part of the Region III T.I.E. Grant.