Pavement Profile Smoothness

ASTM defines roughness as the deviations of a surface from a true planar surface with characteristic dimensions that affect a vehicle ride quality.

Smoothness Matters

National surveys of road users list smooth pavement as a top highway characteristic. Rough or uneven pavement adversely affects driver safety, fuel efficiency, ride quality, vehicle wear-and-tear, and pavement durability.

Smoothness Specifications

Inertial Profiler Certification Program

File Sharing System

Measuring Smoothness

  • International Roughness Index
  • National Rankings
  • How Texture Relates
  • Measuring Devices

Smoothness Publications and Presentations


Related Websites