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Publication Number: FHWA-HRT-08-056
Date: November 2008

LTPP Manual for Profile Measurements and Processing

APPENDIX G. FORMS FOR INTER-REGIONAL PROFILER COMPARISON TESTS

STATIC HEIGHT SENSOR MEASUREMENTS

RSC:
Date:
Distance from Ground to Sensor Glass (mm): Left: Center Right

 

Left Sensor
Position Values Shown on Monitor for Dif Ht(Note 1) Avg. of Heights (mm) Actual Block Height (Note 2) (mm) Actual Minus Average (mm) Std Dev. of Heights (mm) (Note 3)
Test 1 Test 2 Test 3 Test 4 Test 5
Base Plate + 25 mm Block + Calibration Plate                  
Base Plate + 50 mm Block + Calibration Plate                  
Base Plate + 75 mm Block + Calibration Plate                  
Base Plate + 100 mm Block + Calibration Plate                  

 

Center Sensor
Position Values Shown on Monitor for Dif Ht (Note 1) Avg. of Heights (mm)

Actual Block Height (Note 2) (mm)

Actual Minus Average (mm) Standard Dev. of Heights (mm) (Note 3)
Test 1 Test 2 Test 3 Test 4 Test 5
Base Plate + 25 mm Block + Calibration Plate                  
Base Plate + 50 mm Block + Calibration Plate                  
Base Plate + 75 mm Block + Calibration Plate                  
Base Plate + 100 mm Block + Calibration Plate                  

 

Right Sensor
Position Values Shown on Monitor for Dif Ht (Note 1) Avg. of Heights (mm) Actual Block Height (Note 2) (mm) Actual Minus Average (mm) Standard Dev. of Heights (mm) (Note 3)
Test 1 Test 2 Test 3 Test 4 Test 5
Base Plate + 25 mm Block + Calibration Plate                  
Base Plate + 50 mm Block + Calibration Plate                  
Base Plate + 75 mm Block + Calibration Plate                  
Base Plate + 100 mm Block + Calibration Plate                  

Note 1: Do Test 1 for each block position. Then repeat procedure for other tests. Let computer take 500 readings before recording value.

Note 2: Record actual height of block stamped on block in this column

Note 3: Calculate standard deviation using the STDEV function in Excel

DMI MEASUREMENTS FORM

RSC:
Date:
Left Rear Tire Pressure Prior to Test (psi): _________
Right Rear Tire Pressure Prior to Test (psi): _________
Left Rear Tire Pressure After Last Run (psi): _________
Right Rear Tire Pressure After Last Run (psi): _________

Note: Calibrate DMI before performing DMI Measurements.

Run Number Air Temp. (°C) Distance (m) See Note 1
1    
2    
3    
4    
5    
6    
Average    
Std Dev    

Note 1: Record values shown for "Distance old DCF"

Note 2: Use the STDEV function in Excel to calculate Std. Deviation

DMI VERIFICATION FORM

RSC:
Date:
Left Rear Tire Pressure Prior to Test (psi):______
Right Rear Tire Pressure Prior to Test (psi):______
Left Rear Tire Pressure After Last Run (psi):______
Right Rear Tire Pressure After Last Run (psi):______

Note: Do Not Calibrate DMI Before Performing Measurements.

Run Number Air Temp. (°C) Distance (m) See Note 1
1    
2    
3    
4    
5    
6    
Average    
Std Dev    

Note 1: Record values shown for "Distance old DCF"

Note 2: Use the STDEV function in Excel to calculate Std. Deviation

IRI VALUES

Left Wheel Path
Site Number Site Description Left Wheel Path IRI (m/km) Run Number Average IRI (m/km) Standard Deviation (m/km) (Note 1)
1 2 3 4 5
1 Smooth AC              
2 Rough AC              
3 Smooth PCC              
4 Rough PCC              
5 Chip Seal              

 

Right Wheel Path
Site Number Site Description Right Wheel Path IRI (m/km) Run Number Average IRI (m/km) Standard Deviation (m/km) (Note 1)
1 2 3 4 5
1 Smooth AC              
2 Rough AC              
3 Smooth PCC              
4 Rough PCC              
5 Chip Seal              

Note 1: Use the STDEV function in Excel to calculate Std. Deviation

 

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The Federal Highway Administration (FHWA) is a part of the U.S. Department of Transportation and is headquartered in Washington, D.C., with field offices across the United States. is a major agency of the U.S. Department of Transportation (DOT).
The Federal Highway Administration (FHWA) is a part of the U.S. Department of Transportation and is headquartered in Washington, D.C., with field offices across the United States. is a major agency of the U.S. Department of Transportation (DOT). Provide leadership and technology for the delivery of long life pavements that meet our customers needs and are safe, cost effective, and can be effectively maintained. Federal Highway Administration's (FHWA) R&T Web site portal, which provides access to or information about the Agency’s R&T program, projects, partnerships, publications, and results.
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