Note: Average
operating speed is the speed at which most drivers would travel a
section of road with the current alignment and normal weather conditions.
Average:
Pavement texture may cause minimum tire noise; isolated cases
(up to 1/4 of the section ) of bumps and dips; operating speed
can be maintained safely.
Slightly
Rough: 1/4 to 1/2 of the section is uneven and bumpy with
dips, rises, and ruts; pavement may be broken and cracked with
a resulting increase in tire noise; slight difficulty in maintaining
operating speed over section.
Rough:Greater
than 1/2 of section is uneven and bumpy; rider is frequently
jostled; rather large and frequent pavement failures and rough
texture may be present causing a high increase in tire noise
and jolts; operating speed cannot be maintained safely.
Description:
Riding quality is what the general public perceives as the indicator
of how well a road is holding up. Edge rutting, patching and localized
dips significantly contribute to how the rater should look at ride
quality.
Ride quality
is not to take into account rolling or mountainous terrain nor curved
alignment. These conditions would exist no matter if the pavement
was smooth or rough.