Driving Comfort Evaluation for Manhole Covers and Pavement around Manholes

Table 2

Relationships between driving comfort and RMS of weighted acceleration.

RMS of weighted acceleration (m/s^2)	Driver’s comfort
<0.315	Comfortable
0.315∼0.630	Slightly uncomfortable
0.500∼1.000	A little uncomfortable
0.800∼1.600	Uncomfortable
1.250∼2.500	Quite uncomfortable
>2.000	Extremely uncomfortable