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From page 171... ... C-2 INTRODUCTION This appendix summarizes the responses provided by state highway agencies that participated in the pavement friction survey conducted in August 2003. PROCEDURES AND EQUIPMENT USED TO MEASURE PAVEMENT SURFACE CHARACTERISTICS Pavement Friction Test Protocol/Procedure Forty-one of the 45 responding agencies indicated using ASTM E 274 ("Test Method for Skid Resistance of Paved Surfaces Using a Full-Scale Tire") Read the entire page →
From page 172... ... C-3 Table C-1. Test tires used as part of ASTM E 274 pavement surface friction testing. Read the entire page →
From page 173... ... C-4 Frequency of Calibration of Test Equipment As seen in table C-2, there was a wide range of responses concerning the frequency of calibration of test equipment. The responses include both local calibrations of system components (force plate, water flow, etc.) Read the entire page →
From page 174... ... C-5 Table C-3. Summary of test methods performed to characterize pavement–tire noise. Read the entire page →
From page 175... ... C-6 Table C-4. Summary of test methods performed to characterize pavement–tire noise (continued) Read the entire page →
From page 176... ... C-7 Pavement Surface Texture Test Methods Table C-4 summarizes test methods used by the 45 responding agencies to characterize pavement surface texture. The table shows that about half (23) Read the entire page →
From page 177... ... C-8 Table C-5. Frequency of pavement surface texture testing. Read the entire page →
From page 178... ... C-9 DESIGN AND CONSTRUCTION STANDARDS FOR ENSURING HIGH-FRICTION, LOWNOISE PAVEMENTS (NEW AND RESTORED) Pavement Friction Aggregate Properties and Tests The vast majority of states (41 of 45) Read the entire page →
From page 179... ... C-10 Table C-6. Summary of test properties used in aggregate selection. Read the entire page →
From page 180... ... C-11 Table C-7. Summary of the surface material requirements and finishing specifications. Read the entire page →
From page 181... ... C-12 Table C-8. Agency methods for PCC finishing/texturing. Read the entire page →
From page 182... ... C-13 This table shows that 37 of the 45 agencies specify tining as a finishing method for new PCC surfaces. Twenty-one states specify burlap or Astroturf drag techniques, mostly in conjunction with tining, while 25 states use grooving or grinding on either new or existing PCC pavement. Read the entire page →
From page 183... ... C-14 Table C-9. Trigger values used in identifying potential friction-deficient locations. Read the entire page →
From page 184... ... C-15 Table C-10. Summary of treatments used to restore pavement surface friction. Read the entire page →
From page 185... ... C-16 Table C-11. Textures specified for noise in PCC design. Read the entire page →
From page 186... ... C-17 SAFETY AND LEGAL ISSUES RELATED TO FRICTION/TEXTURE AND CRASH RATES Agency Practices Relating Friction to Crashes Although several states compare wet-weather crash rates with friction test results to determine if a site needs remedial action, only a few have investigated the relationship on a broad scale. Texas and North Carolina reported finding no direct correlation between friction and crashes. Read the entire page →

From page 171...

... C-2 INTRODUCTION This appendix summarizes the responses provided by state highway agencies that participated in the pavement friction survey conducted in August 2003. PROCEDURES AND EQUIPMENT USED TO MEASURE PAVEMENT SURFACE CHARACTERISTICS Pavement Friction Test Protocol/Procedure Forty-one of the 45 responding agencies indicated using ASTM E 274 ("Test Method for Skid Resistance of Paved Surfaces Using a Full-Scale Tire")